This function is called when the user selects a thumbnail in window hWndThumbnail.
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typedef VOID (ACCUAPI LPFNIG_GUITHUMBSELECT) (
LPVOID lpPrivate,
HWND hWndThumbnail,
const LPSTR lpszFileName,
const LPAT_DIB lpDIB,
UINT nPageNumber
);
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| Name | Type | Description |
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| lpPrivate | LPVOID | Far pointer to private data passed. |
| hWndThumbnail | HWND | Thumbnail window handle. |
| lpszFileName | const LPSTR | Far pointer to zero- terminated string, file name of thumbnail selected. |
| lpDIB | const LPAT_DIB | Far pointer to its DIB. |
| nPageNumber | UINT | Page number of the thumbnail that was selected from a GUI window. If the thumbnail comes from a non multi-page file, nPageNumber = 1. |
None
All pixel formats supported by ImageGear for C and C++.
Display, Thumbnail
For a complete example showing the use of this and other IG_GUI_Thumbnail functions and callbacks, see the Thumbnail sample application.
This type of callback function is registered by a call to IG_GUI_thumbnail_CB_register().
You are passed the filename and the address of a copy of the thumbnail image's DIB header. You are also passed the page number of the image in the file.