ICM_COMPRESS_QUERY message
The ICM_COMPRESS_QUERY message queries a video compression driver to determine if it supports a specific input format or if it can compress a specific input format to a specific output format. You can send this message explicitly or by using the ICCompressQuery macro.
ICM_COMPRESS_QUERY
wParam = (DWORD_PTR) (LPVOID) lpbiInput;
lParam = (DWORD_PTR) (LPVOID) lpbiOutput;
Parameters
-
lpbiInput
-
Pointer to a BITMAPINFO structure containing the input format.
-
lpbiOutput
-
Pointer to a BITMAPINFO structure containing the output format. You can specify zero for this parameter to indicate any output format is acceptable.
Return Value
Returns ICERR_OK if the specified compression is supported or ICERR_BADFORMAT otherwise.
Remarks
When a driver receives this message, it should examine the BITMAPINFO structure associated with lpbiInput to determine if it can compress the input format.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client |
Windows 2000 Professional [desktop apps only] |
| Minimum supported server |
Windows 2000 Server [desktop apps only] |
| Header |
|