Platform SDK: Windows Multimedia |
The ICM_DRAW_QUERY message queries a rendering driver to determine if it can render data in a specific format. You can send this message explicitly or by using the ICDrawQuery macro.
ICM_DRAW_QUERY wParam = (DWORD) (LPVOID) lpbiInput; lParam = 0;
Returns ICERR_OK if the driver can render data in the specified format or ICERR_BADFORMAT otherwise.
This message differs from the ICM_DRAW_BEGIN message in that it queries the driver in a general sense. ICM_DRAW_BEGIN determines if the driver can draw the data using the specified format under specific conditions, such as stretching the image.
Windows NT/2000: Requires Windows NT 3.1 or later.
Windows 95/98: Requires Windows 95 or later.
Header: Declared in Vfw.h.
Video Compression Manager Overview, Video Compression Messages, BITMAPINFO, ICDrawQuery, ICM_DRAW_BEGIN