ImageGear for C and C++ on Windows v21.0 - Updated
API Reference Guide / Core Component API Reference / Core Component Functions Reference / GUI Functions / GUI Thumbnail Functions / IG_GUI_thumbnail_load_CB_register
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    IG_GUI_thumbnail_load_CB_register
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    Call this function to register a callback function to be called whenever a thumbnail is loaded in the thumbnail window hwndThumbnail.

    Declaration:

     
    Copy Code
    AT_ERRCOUNT ACCUAPI IG_GUI_thumbnail_load_CB_register(   
            HWND hwndThumbnail,   
            LPFNIG_GUITHUMBLOAD lpfnThumbLoad,   
            LPVOID lpPrivateData   
    );
    

    Arguments:

    Name Type Description
    hwndThumbnail HWND Windows handle to the Thumbnail window.
    lpfnThumbLoad LPFNIG_GUITHUMBLOAD A pointer to the callback function that you are registering, to be called whenever a thumbnail is loaded.
    lpPrivateData LPVOID A far pointer to any private data to which you want to pass the callback.

    Return Value:

    Returns the number of ImageGear errors that occurred during this function call.

    Supported Raster Image Formats:

    This function does not process image pixels.

    Sample:

    None

    Example:

    See example under LPFNIG_GUITHUMBLOAD function.

    Remarks:

    See also the description for callback type LPFNIG_GUITHUMBLOAD.