ICM_COMPRESS_QUERY

	Overview

	Group

	Quick Info

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) (LPVOID) lpbiInput;

lParam = (DWORD) (LPVOID) lpbiOutput;

Parameters
lpbiInput

Address of a BITMAPINFO structure containing the input format.

lpbiOutput

Address of a BITMAPINFO structure containing the output format. You can specify zero for this parameter to indicate any output format is acceptable.

Return Values
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.

See Also
BITMAPINFO, ICCompressQuery

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