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ICM_DRAW_QUERY

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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;

Parameters

lpbiInput

Pointer to a BITMAPINFO structure containing the input format.

Return Values

Returns ICERR_OK if the driver can render data in the specified format or ICERR_BADFORMAT otherwise.

Remarks

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.

Requirements

**  Windows NT/2000/XP:** Included in Windows NT 3.1 and later.
**  Windows 95/98/Me:** Included in Windows 95 and later.
**  Header:** Declared in Vfw.h.

See Also

Video Compression Manager, Video Compression Messages, BITMAPINFO, ICDrawQuery, ICM_DRAW_BEGIN