Call this function to register a callback function that is to be called to sort the thumbnails in the window hWndThumbnail.
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AT_ERRCOUNT ACCUAPI IG_GUI_thumbnail_sort (
HWND hWndThumbnail,
LPFNIG_GUITHUMBCOMP lpfnThumbCompare,
LPVOID lpPrivate
);
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| Name | Type | Description |
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| hWndThumbnail | HWND | Handle of Thumbnail window. |
| lpfnThumbCompare | LPFNIG_GUITHUMBCOMP | Far pointer to callback function to be called to compare thumbnails for a sort. |
| lpPrivate | LPVOID | Far pointer to private data to be passed to the callback function. |
Returns the number of ImageGear errors that occurred during this function call.
All pixel formats supported by ImageGear for C and C++.
The callback used with this function correctly reports color space and bit depth for these pixel formats only:
Indexed RGB – 1, 4, 8 bpp;
Grayscale – 9…16 bpp;
RGB – 24 bpp;
CMYK – 32 bpp
For an example showing the use of this and other IG_GUI_Thumbnail functions and callbacks, see sample application THUMB.
See also the description for the callback type LPFNIG_GUITHUMBCOMP. It is your callback function that performs the actual sorting.