{WebTwainObject} IO

/**
 * Return or set whether to insert or append images when they are scanned/loaded.
 */
IfAppendImage: boolean;

/**
 * Load image(s) specified by its absolute path.
 * @param fileName The path of the image to load.
 * @param successCallback A callback function that is executed if the request succeeds.
 * @param failureCallback A callback function that is executed if the request fails.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 */
LoadImage(
    fileName: string,
    successCallback ? : () => void,
    failureCallback ? : (
        errorCode: number,
        errorString: string) => void
): void | boolean;

DWObject.LoadImage(
    "C:\\DWT.jpg",
    function() {
        console.log('success');
    },
    function(errorCode, errorString) {
        console.log(errorString);
    }
);

/**
 * Load image(s) specified by its absolute path.
 * @param fileName The path of the image to load.
 * @param type The format of the image.
 * @param successCallback A callback function that is executed if the request succeeds.
 * @param failureCallback A callback function that is executed if the request fails.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 */
LoadImageEx(
    fileName: string,
    type: Dynamsoft.EnumDWT_ImageType | number,
    successCallback ? : () => void,
    failureCallback ? : (
        errorCode: number,
        errorString: string) => void
): void | boolean;

DWObject.LoadImageEx(
    "C:\\DWT.jpg",
    Dynamsoft.EnumDWT_ImageType.IT_JPG,
    function() {
        console.log('success');
    },
    function(errorCode, errorString) {
        console.log(errorString);
    }
);

/**
 * Load image(s) from a base64 string.
 * @param imageData The image data which is a base64 string without the data URI scheme.
 * @param successCallback A callback function that is executed if the request succeeds.
 * @param failureCallback A callback function that is executed if the request fails.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 */
LoadImageFromBase64Binary(
    imageData: string,
    imageType: Dynamsoft.EnumDWT_ImageType,
    successCallback ? : () => void,
    failureCallback ? : (
        errorCode: number,
        errorString: string) => void
): void | boolean;

DWObject.ConvertToBase64(
    [0, 1, 2],
    Dynamsoft.EnumDWT_ImageType.IT_PDF,
    function(result, indices, type) {
        DWObject.LoadImageFromBase64Binary(
            result.getData(0, result.getLength()),
            Dynamsoft.EnumDWT_ImageType.IT_PDF,
            function() {
                console.log('success');
            },
            function(errorCode, errorString) {
                console.log(errorString);
            }
        );
    },
    function(errorCode, errorString) {
        console.log(errorString);
    }
);

/**
 * Load image(s) from a binary object (Blob | ArrayBuffer).
 * @param imageData The image data.
 * @param successCallback A callback function that is executed if the request succeeds.
 * @param failureCallback A callback function that is executed if the request fails.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 */
LoadImageFromBinary(
    imageData: Blob | ArrayBuffer,
    successCallback: () => void,
    failureCallback: (
        errorCode: number,
        errorString: string) => void
): void;

DWObject.ConvertToBlob(
    [0, 1, 2],
    Dynamsoft.EnumDWT_ImageType.IT_PDF,
    function(result, indices, type) {
        DWObject.LoadImageFromBinary(
            result,
            function() {
                console.log('success');
            },
            function(errorCode, errorString) {
                console.log(errorString);
            }
        );
    },
    function(errorCode, errorString) {
        console.log(errorString);
    }
);

/**
 * Load an image from the system clipboard. The image must be in DIB format.
 * @param successCallback A callback function that is executed if the request succeeds.
 * @param failureCallback A callback function that is executed if the request fails.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 */
LoadDibFromClipboard(
    successCallback ? : () => void,
    failureCallback ? : (
        errorCode: number,
        errorString: string) => void
): void | boolean;

/**
 * This event is triggered when {ShowFileDialog} is called or when  {LoadImageEx} is called with {IfShowFileDialog} set to true.
 * @argument isSave Whether or not the event is triggered after a save-file dialog was shown or a open-file dialog.
 * @argument filesCount How many files were selected.
 * @argument index The index of the current image.
 * @argument directory The parent directory of currently selected file(s), "\\" is not included. If the methed ShowFileDialog() failed, the initial directory path set in the ShowFileDialog method is returned.
 * @argument fileName The current file name.
 */
RegisterEvent('OnGetFilePath',
    function(
        isSave: boolean,
        filesCount: number,
        index: number,
        directory: string,
        fileName: string) {}
);

/**
 * This event is triggered when a file from a local directory has been loaded into the control.
 * @argument directory The directory of the loaded file.
 * @argument fileName The name of the loaded file.
 * @argument fileType The file type.
 */
RegisterEvent('OnPostLoad',
    function(
        directory: string,
        fileName: string,
        fileType: string) {}
);

/**
 * Download the specified file via FTP
 * @param host The FTP Host.
 * @param path Specify the file to download.
 * @param successCallback A callback function that is executed if the request succeeds.
 * @param failureCallback A callback function that is executed if the request fails.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 */
FTPDownload(
    host: string,
    path: string,
    successCallback: () => void,
    failureCallBack: (
        errorCode: number,
        errorString: string) => void
): void;

/**
 * Download the specified file via FTP.
 * @param host The FTP Host.
 * @param path Specify the file to download.
 * @param type The format of the file.
 * @param successCallback A callback function that is executed if the request succeeds.
 * @param failureCallback A callback function that is executed if the request fails.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 */
FTPDownloadEx(
    host: string,
    path: string,
    type: Dynamsoft.EnumDWT_ImageType | number,
    successCallback: () => void,
    failureCallBack: (
        errorCode: number,
        errorString: string) => void
): void;

/**
 * Upload the specified image via FTP.
 * @param host The FTP Host.
 * @param index Specify the image.
 * @param path The path to save the file.
 * @param successCallback A callback function that is executed if the request succeeds.
 * @param failureCallback A callback function that is executed if the request fails.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 */
FTPUpload(
    host: string,
    index: number,
    path: string,
    successCallback: () => void,
    failureCallback: (
        errorCode: number,
        errorString: string) => void
): void;

/**
 * Upload the specified image via FTP.
 * @param host The FTP Host.
 * @param index Specify the image.
 * @param path The path to save the file.
 * @param type The format of the file.
 * @param successCallback A callback function that is executed if the request succeeds.
 * @param failureCallback A callback function that is executed if the request fails.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 */
FTPUploadEx(
    host: string,
    index: number,
    path: string,
    type: Dynamsoft.EnumDWT_ImageType | number,
    successCallback: () => void,
    failureCallback: (
        errorCode: number,
        errorString: string) => void
): void;

/**
 * Upload all images as a multi-page TIFF via FTP.
 * @param host The FTP Host.
 * @param path Specify the path to save the file.
 * @param successCallback A callback function that is executed if the request succeeds.
 * @param failureCallback A callback function that is executed if the request fails.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 */
FTPUploadAllAsMultiPageTIFF(
    host: string,
    path: string,
    successCallback: () => void,
    failureCallback: (
        errorCode: number,
        errorString: string) => void
): void;

/**
 * Upload all images as a multi-page PDF via FTP.
 * @param host The FTP Host.
 * @param path Specify the path to save the file.
 * @param successCallback A callback function that is executed if the request succeeds.
 * @param failureCallback A callback function that is executed if the request fails.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 */
FTPUploadAllAsPDF(
    host: string,
    path: string,
    successCallback: () => void,
    failureCallback: (
        errorCode: number,
        errorString: string) => void
): void;

/**
 * Upload selected images as a multi-page PDF via FTP.
 * @param host The FTP Host.
 * @param path Specify the path to save the file.
 * @param successCallback A callback function that is executed if the request succeeds.
 * @param failureCallback A callback function that is executed if the request fails.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 */
FTPUploadAsMultiPagePDF(
    host: string,
    path: string,
    successCallback: () => void,
    failureCallback: (
        errorCode: number,
        errorString: string) => void
): void;

/**
 * Upload selected images as a multi-page TIFF via FTP.
 * @param host The FTP Host.
 * @param path Specify the path to save the file.
 * @param successCallback A callback function that is executed if the request succeeds.
 * @param failureCallback A callback function that is executed if the request fails.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 */
FTPUploadAsMultiPageTIFF(
    host: string,
    path: string,
    type: Dynamsoft.EnumDWT_ImageType | number,
    successCallback: () => void,
    failureCallback: (
        errorCode: number,
        errorString: string) => void
): void;

/**
 * The password to connect to the FTP.
 */
FTPUserName: string;

/**
 * The password to connect to the FTP.
 */
FTPPassword: string;

/**
 * The port to connect to the FTP.
 */
FTPPort: number;

/**
 * Return or set whether to use passive mode when connect to the FTP.
 */
IfPASVMode: boolean;

/**
 * [Deprecation] Return or set the password used to log into the HTTP server.
 */
HTTPPassword: string;

/**
 * [Deprecation] Return or set the user name used to log into the HTTP server.
 */
HTTPUserName: string;

/**
 * Download the specified file via a HTTP Get request.
 * @param host The HTTP Host.
 * @param path Specify the path of the file to download.
 * @param successCallback A callback function that is executed if the request succeeds.
 * @param failureCallback A callback function that is executed if the request fails.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 */
HTTPDownload(
    host: string,
    path: string,
    successCallback: () => void,
    failureCallback: (
        errorCode: number,
        errorString: string) => void
): void;

/**
 * Download the specified file via a HTTP Get request.
 * @param host The HTTP Host.
 * @param path Specify the path of the file to download.
 * @param type The format of the file.
 * @param successCallback A callback function that is executed if the request succeeds.
 * @param failureCallback A callback function that is executed if the request fails.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 */
HTTPDownloadEx(
    host: string,
    path: string,
    type: Dynamsoft.EnumDWT_ImageType | number,
    successCallback: () => void,
    failureCallback: (
        errorCode: number,
        errorString: string) => void
): void;

/**
 * Download the specified file via a HTTP Post request.
 * @param host The HTTP Host.
 * @param path Specify the path of the file to download.
 * @param type The format of the file.
 * @param onEmptyResponse A callback function that is executed if the response is empty.
 * @param onServerReturnedSomething A callback function that is executed if the response is not empty.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 * @argument response The response string.
 */
HTTPDownloadThroughPost(
    host: string,
    path: string,
    type: Dynamsoft.EnumDWT_ImageType | number,
    onEmptyResponse: () => void,
    onServerReturnedSomething: (
        errorCode: number,
        errorString: string,
        response: string, ) => void,
): void;

/**
 * Download the specified file via a HTTP Get request.
 * @param host The HTTP Host.
 * @param path Specify the path of the file to download.
 * @param localPath Specify where to save the file.
 * @param successCallback A callback function that is executed if the request succeeds.
 * @param failureCallback A callback function that is executed if the request fails.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 */
HTTPDownloadDirectly(
    host: string,
    path: string,
    localPath: string,
    successCallback: () => void,
    failureCallback: (
        errorCode: number,
        errorString: string) => void
): void;

DWObject.RegisterEvent('OnGetFilePath',
    function(isSave, filesCount, index, directory, fileName) {
        DWObject.HTTPDownloadDirectly(
            "tst.dynamsoft.com",
            "/public/download/tools/Twack_32.msi",
            directory + "\\" + fileName,
            function() {},
            function(errorCode, errorString) {
                console.log(errorString);
            }
        );
    }
);
DWObject.ShowFileDialog(true, "MSI|*.msi", 0, ".msi", "", true, false, 1);

/**
 * Upload the specified image(s) via a HTTP Post.
 * @param URL The server-side script to receive the post.
 * @param indices Specify the image(s).
 * @param type The format of the file.
 * @param dataFormat Whether to upload the file as binary or a base64 string.
 * @param fileName The file name.
 * @param onEmptyResponse A callback function that is executed if the response is empty.
 * @param onServerReturnedSomething A callback function that is executed if the response is not empty.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 * @argument response The response string.
 */
HTTPUpload(
    URL: string,
    indices: number[],
    type: Dynamsoft.EnumDWT_ImageType | number,
    dataFormat: Dynamsoft.EnumDWT_UploadDataFormat | number,
    fileName: string,
    onEmptyResponse: () => void,
    onServerReturnedSomething: (
        errorCode: number,
        errorString: string,
        response: string) => void
): void;
HTTPUpload(
    URL: string,
    indices: number[],
    type: Dynamsoft.EnumDWT_ImageType | number,
    dataFormat: Dynamsoft.EnumDWT_UploadDataFormat | number,
    onEmptyResponse: () => void,
    onServerReturnedSomething: (
        errorCode: number,
        errorString: string,
        response: string) => void
): void;
HTTPUpload(
    URL: string,
    onEmptyResponse: () => void,
    onServerReturnedSomething: (
        errorCode: number,
        errorString: string,
        response: string) => void
): void;

/**
 * Upload the specified image via a HTTP Put request.
 * @param host The HTTP Host.
 * @param index Specify the image.
 * @param path Specify the path to put the file.
 * @param type The format of the file.
 * @param successCallback A callback function that is executed if the request succeeds.
 * @param failureCallback A callback function that is executed if the request fails.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 */
HTTPUploadThroughPutEx(
    host: string,
    index: number,
    path: string,
    type: Dynamsoft.EnumDWT_ImageType | number,
    successCallback: () => void,
    failureCallback: (
        errorCode: number,
        errorString: string) => void
): void;

/**
 * Upload the specified image via a HTTP Post request.
 * @param host The HTTP Host.
 * @param index Specify the image.
 * @param target The target wherethe request is sent.
 * @param type The format of the file.
 * @param fileName The file name.
 * @param onEmptyResponse A callback function that is executed if the response is empty.
 * @param onServerReturnedSomething A callback function that is executed if the response is not empty.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 * @argument response The response string.
 */
HTTPUploadThroughPost(
    host: string,
    index: number,
    target: string,
    fileName: string,
    onEmptyResponse: () => void,
    onServerReturnedSomething: (
        errorCode: number,
        errorString: string,
        response: string) => void
): void;

/**
 * Upload the specified image via a HTTP Post request.
 * @param host The HTTP Host.
 * @param index Specify the image.
 * @param target The target wherethe request is sent.
 * @param fileName The file name.
 * @param type The format of the file.
 * @param onEmptyResponse A callback function that is executed if the response is empty.
 * @param onServerReturnedSomething A callback function that is executed if the response is not empty.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 * @argument response The response string.
 */
HTTPUploadThroughPostEx(
    host: string,
    index: number,
    target: string,
    fileName: string,
    type: Dynamsoft.EnumDWT_ImageType | number,
    onEmptyResponse: () => void,
    onServerReturnedSomething: (
        errorCode: number,
        errorString: string,
        response: string) => void
): void;

/**
 * Upload all images in the buffer as a TIFF file via a HTTP Post request.
 * @param host The HTTP Host.
 * @param target The target wherethe request is sent.
 * @param fileName The file name.
 * @param onEmptyResponse A callback function that is executed if the response is empty.
 * @param onServerReturnedSomething A callback function that is executed if the response is not empty.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 * @argument response The response string.
 */
HTTPUploadAllThroughPostAsMultiPageTIFF(
    host: string,
    target: string,
    fileName: string,
    onEmptyResponse: () => void,
    onServerReturnedSomething: (
        errorCode: number,
        errorString: string,
        response: string) => void
): void;

/**
 * Upload all images in the buffer as a PDF file via a HTTP Post request.
 * @param host The HTTP Host.
 * @param target The target wherethe request is sent.
 * @param fileName The file name.
 * @param onEmptyResponse A callback function that is executed if the response is empty.
 * @param onServerReturnedSomething A callback function that is executed if the response is not empty.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 * @argument response The response string.
 */
HTTPUploadAllThroughPostAsPDF(
    host: string,
    target: string,
    fileName: string,
    onEmptyResponse: () => void,
    onServerReturnedSomething: (
        errorCode: number,
        errorString: string,
        response: string) => void
): void;

/**
 * Upload all selected images in the buffer as a PDF file via a HTTP Post request.
 * @param host The HTTP Host.
 * @param target The target wherethe request is sent.
 * @param fileName The file name.
 * @param onEmptyResponse A callback function that is executed if the response is empty.
 * @param onServerReturnedSomething A callback function that is executed if the response is not empty.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 * @argument response The response string.
 */
HTTPUploadThroughPostAsMultiPagePDF(
    host: string,
    target: string,
    fileName: string,
    onEmptyResponse: () => void,
    onServerReturnedSomething: (
        errorCode: number,
        errorString: string,
        response: string) => void
): void;

/**
 * Upload all selected images in the buffer as a TIFF file via a HTTP Post request.
 * @param host The HTTP Host.
 * @param target The target wherethe request is sent.
 * @param fileName The file name.
 * @param onEmptyResponse A callback function that is executed if the response is empty.
 * @param onServerReturnedSomething A callback function that is executed if the response is not empty.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 * @argument response The response string.
 */
HTTPUploadThroughPostAsMultiPageTIFF(
    host: string,
    target: string,
    fileName: string,
    onEmptyResponse: () => void,
    onServerReturnedSomething: (
        errorCode: number,
        errorString: string,
        response: string) => void
): void;

/**
 * Upload the specified file via a HTTP Post request.
 * @param host The HTTP Host.
 * @param path Specify the file to upload.
 * @param target The target wherethe request is sent.
 * @param fileName The file name.
 * @param onEmptyResponse A callback function that is executed if the response is empty.
 * @param onServerReturnedSomething A callback function that is executed if the response is not empty.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 * @argument response The response string.
 */
HTTPUploadThroughPostDirectly(
    host: string,
    path: string,
    target: string,
    fileName: string,
    onEmptyResponse: () => void,
    onServerReturnedSomething: (
        errorCode: number,
        errorString: string,
        response: string) => void
): void;

DWObject.RegisterEvent('OnGetFilePath',
    function(isSave, filesCount, index, directory, fileName) {
        DWObject.HTTPUploadThroughPostDirectly(
            "localhost",
            directory + "\\" + fileName,
            "SaveUploadedFile.aspx",
            fileName,
            function() {},
            function(errorCode, errorString, response) {
                console.log(errorString + " " + response);
            }
        );
    }
);
DWObject.ShowFileDialog(false, "All Files|*.*", 0, "", "", false, false, 1);

/**
 * Return or set the field name for the uploaded file. 
 * By default, it's "RemoteFile".
 */
HttpFieldNameOfUploadedImage: string;

/**
/**
 * Return or set the HTTP Port.
 */
HTTPPort: number;

/**
/**
 * Return or set whether to use SSL in HTTP requests.
 */
IfSSL: boolean;

/**
 * Return the response string of the latest HTTP Post request.
 */
readonly HTTPPostResponseString: string;

/**
 * Return or set the maximum allowed size of a file to upload (in bytes).
 */
MaxUploadImageSize: number;

/**
 * This event is triggered multiple times during a HTTP upload or download request.
 * @argument percentage Return the progress by percentage.
 */
RegisterEvent('OnInternetTransferPercentage',
    function(percentage: number) {});

/**
 * Convert the specified images to a base64 string.
 * @param indices Specify one or multiple images.
 * @param type The file type.
 * @param successCallback A callback function that is executed if the request succeeds.
 * @param failureCallback A callback function that is executed if the request fails.
 * @argument result The resulting base64 string.
 * @argument indices The indices of the converted images.
 * @argument type The file type.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 */
ConvertToBase64(
    indices: number[],
    type: Dynamsoft.EnumDWT_ImageType | number,
    successCallback: (
        result: Base64Result,
        indices: number[],
        type: number) => void,
    failureCallBack: (
        errorCode: number,
        errorString: string) => void
): void;

interface Base64Result {
    /**
     * Return the length of the result string.
     */
    getLength(): number;
    /**
     * Return part of the string.
     * @param offset The starting position.
     * @param length The length of the expected string.
     */
    getData(offset: number, length: number): string;
    /**
     * Return the MD5 value of the result.
     */
    getMD5(): string;
}

DWObject.ConvertToBase64(
    [0, 1, 2],
    Dynamsoft.EnumDWT_ImageType.IT_PDF,
    function(result, indices, type) {
        console.log(result.getData(0, result.getLength()));
    },
    function(errorCode, errorString) {
        console.log(errorString);
    }
);

/**
 * Convert the specified images to a blob.
 * @param indices Specify one or multiple images.
 * @param type The file type.
 * @param successCallback A callback function that is executed if the request succeeds.
 * @param failureCallback A callback function that is executed if the request fails.
 * @argument result The resulting blob.
 * @argument indices The indices of the converted images.
 * @argument type The file type.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 */
ConvertToBlob(
    indices: number[],
    type: Dynamsoft.EnumDWT_ImageType | number,
    successCallback: (
        result: Blob,
        indices: number[],
        type: number) => void,
    failureCallBack: (
        errorCode: number,
        errorString: string) => void
): void;

DWObject.ConvertToBlob(
    [0, 1, 2],
    Dynamsoft.EnumDWT_ImageType.IT_PDF,
    function(result, indices, type) {
        console.log(result.size);
    },
    function(errorCode, errorString) {
        console.log(errorString);
    }
);

/**
 * Save the specified image as a BMP file.
 * @param fileName The name to save to.
 * @param index The index which specifies the image to save.
 * @param successCallback A callback function that is executed if the request succeeds.
 * @param failureCallback A callback function that is executed if the request fails.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 */
SaveAsBMP(
    fileName: string,
    index: number,
    successCallback ? : () => void,
    failureCallback ? : (errorCode: number, errorString: string) => void
): void | boolean;

/**
 * Save the specified image as a JPEG file.
 * @param fileName The name to save to.
 * @param index The index which specifies the image to save.
 * @param successCallback A callback function that is executed if the request succeeds.
 * @param failureCallback A callback function that is executed if the request fails.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 */
SaveAsJPEG(
    fileName: string,
    index: number,
    successCallback ? : () => void,
    failureCallback ? : (errorCode: number, errorString: string) => void
): void | boolean;

/**
 * Save the specified image as a PDF file.
 * @param fileName The name to save to.
 * @param index The index which specifies the image to save.
 * @param successCallback A callback function that is executed if the request succeeds.
 * @param failureCallback A callback function that is executed if the request fails.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 */
SaveAsPDF(
    fileName: string,
    index: number,
    successCallback ? : () => void,
    failureCallback ? : (errorCode: number, errorString: string) => void
): void | boolean;

/**
 * Save the specified image as a PNG file.
 * @param fileName The name to save to.
 * @param index The index which specifies the image to save.
 * @param successCallback A callback function that is executed if the request succeeds.
 * @param failureCallback A callback function that is executed if the request fails.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 */
SaveAsPNG(
    fileName: string,
    index: number,
    successCallback ? : () => void,
    failureCallback ? : (errorCode: number, errorString: string) => void
): void | boolean;

/**
 * Save the specified image as a TIFF file.
 * @param fileName The name to save to.
 * @param index The index which specifies the image to save.
 * @param successCallback A callback function that is executed if the request succeeds.
 * @param failureCallback A callback function that is executed if the request fails.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 */
SaveAsTIFF(
    fileName: string,
    index: number,
    successCallback ? : () => void,
    failureCallback ? : (errorCode: number, errorString: string) => void
): void | boolean;

/**
 * Saves all the images in buffer as a multi-page TIFF file.
 * @param fileName The name to save to.
 * @param successCallback A callback function that is executed if the request succeeds.
 * @param failureCallback A callback function that is executed if the request fails.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 */
SaveAllAsMultiPageTIFF(
    fileName: string,
    successCallback ? : () => void,
    failureCallback ? : (errorCode: number, errorString: string) => void
): void | boolean;

/**
 * Saves all the images in buffer as a multi-page PDF file.
 * @param fileName The name to save to.
 * @param successCallback A callback function that is executed if the request succeeds.
 * @param failureCallback A callback function that is executed if the request fails.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 */
SaveAllAsPDF(
    fileName: string,
    successCallback ? : () => void,
    failureCallback ? : (errorCode: number, errorString: string) => void
): void | boolean;

/**
 * Saves all selected images in buffer as a multi-page PDF file.
 * @param fileName The name to save to.
 * @param successCallback A callback function that is executed if the request succeeds.
 * @param failureCallback A callback function that is executed if the request fails.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 */
SaveSelectedImagesAsMultiPagePDF(
    fileName: string,
    successCallback ? : () => void,
    failureCallback ? : (errorCode: number, errorString: string) => void
): void | boolean;

/**
 * Saves all selected images in buffer as a multi-page TIFF file.
 * @param fileName The name to save to.
 * @param successCallback A callback function that is executed if the request succeeds.
 * @param failureCallback A callback function that is executed if the request fails.
 * @argument errorCode The error code.
 * @argument errorString The error string.
 */
SaveSelectedImagesAsMultiPageTIFF(
    fileName: string,
    successCallback ? : () => void,
    failureCallback ? : (
        errorCode: number,
        errorString: string) => void
): void | boolean;

/**
 * Clear the content of all custom tiff tags.
 */
ClearTiffCustomTag(): boolean;

/**
 * Sets a custom tiff tag (up to 32 tags). The string to be set in a tag can be base64 encoded.
 * @param id The id of the custom tag.
 * @param content The content of the tag.
 * @param useBase64Encoding Whether the content is encoded.
 */
SetTiffCustomTag(
    id: number,
    content: string,
    useBase64Encoding: boolean
): boolean;

DWObject.ClearTiffCustomTag();
DWObject.SetTiffCustomTag(700, "Created By DWT", false);
DWObject.SaveAsTIFF("C:\\DWT.tiff", 0);

/**
 * Clear all the custom fields from the HTTP Post Form.
 */
ClearAllHTTPFormField(): boolean;

/**
 * Add a custom field to the HTTP Post Form.
 * @param name The name of the field.
 * @param value The value of the field.
 */
SetHTTPFormField(
    name: string,
    value: string
): boolean;

/**
 * Add a binary file to the HTTP Post Form.
 * @param name The name of the field.
 * @param content The content of the file.
 * @param fileName The name of the file.
 */
SetHTTPFormField(
    name: string,
    content: Blob,
    fileName ? : string
): boolean;

/**
 * Add a custom header to the HTTP Post Form.
 * @param name The name of the field.
 * @param value The value of the field.
 */
SetHTTPHeader(
    name: string,
    value: string
): boolean;

/**
 * Set the segmentation threshold and segment size.
 * @param threshold Specify the threshold (in MB).
 * @param size Specify the segment size (in KB).
 */
SetUploadSegment(
    threshold: number,
    size: number
): boolean;

/**
 * Return or set whether to show open/save file dialog when saving images in the buffer or loading images from a local directory.
 * @Note Supported in Service mode only.
 */
IfShowFileDialog: boolean;

/**
 * Return or set whether to show the progress of an operation with a button to cancel it.
 */
IfShowCancelDialogWhenImageTransfer: boolean;

/**
 * Return or set whether the progress bar is/should be displayed during encoding or decoding. It works for any image encoding/decoding related methods. For example: LoadImage, LoadImageEx, ConvertToBlob, etc.
 */
IfShowProgressBar: boolean;

/**
 * Show the system's save-file dialog or open-file dialog.
 * @param isSave Whether to show a save-file dialog or an open-file dialog
 * @param filter The filter pattern like "JPG | *.jpg".
 * @param filterIndex The order of the filter. Normally, just put 0.
 * @param defaultExtension Extension to be appended to the file name. Only valid in a save-file dialog
 * @param initialDirectory The initial directory that the dialog opens.
 * @param allowMultiSelect Whether or not multiple files can be selected at the same time. Only valid in an open-file dialog.
 * @param showOverwritePrompt Whether or not a prompt shows up when saving a file may overwrite an existing file.
 * @param flag If set to 0, bAllowMultiSelect and bShowOverwritePrompt will be effective. Otherwise, these two parameters are ignored.
 * @Note Supported in Service mode only.
 */
ShowFileDialog(
    isSave: boolean,
    filter: string,
    filterIndex: number,
    defaultExtension: string,
    initialDirectory: string,
    allowMultiSelect: boolean,
    showOverwritePrompt: boolean,
    flag: number
): boolean;

DWObject.RegisterEvent('OnGetFilePath',
    function(isSave, filesCount, index, directory, fileName) {
        alert(" directory: " + directory + "\\" + fileName);
    });

//On macOS
DWObject.ShowFileDialog(false, "TIF,TIFF,JPG,JPEG,PNG,PDF", 0, "", "", true, false, 0);

//On Windows
DWObject.ShowFileDialog(false, "BMP,TIF,JPG,PNG,PDF|*.bmp;*.tif;*.png;*.jpg;*.pdf;*.tiff;*.jpeg", 0,
    "", "", true, false, 0);

/**
 * Export all image data in the buffer to a new browser window and use the browser's built-in print feature to print the image(s).
 * @param useOSPrintWindow Whether to use the print feature of the operating system instead.
 * @Note the parameter only works in Windows Service mode.
 */
Print(useOSPrintWindow ? : boolean): boolean;

/**
 * Return or set the quality for JPEG compression.
 * The values range from 0 to 100.
 */
JPEGQuality: number;

/**
 * Return or set whether to append to or replace an existing TIFF file with the same name.
 */
IfTiffMultiPage: boolean;

/**
 * Return or set the compression type for TIFF files.
 */
TIFFCompressionType: Dynamsoft.EnumDWT_TIFFCompressionType | number;