ICM_DRAW_BEGIN

wParam = (DWORD) (LPVOID) &icdrwBgn;
lParam = sizeof(ICDRAW);

Notifies a rendering driver to prepare to draw data.

Returns ICERR_OK if the driver supports drawing the data to the screen in the specified manner and format, or an error code otherwise. The following values are defined:

ICERR_OK	Indicates no error occurred.
ICERR_BADFORMAT	Indicates the input or output format is not supported.
ICERR_NOTSUPPORTED	Indicates the driver does not draw directly to the screen or does not support this message.

wParam: Address of an ICDRAWBEGIN structure describing the input format.
lParam: Size, in bytes, of the ICDRAWBEGIN structure.

If you want the driver to decompress data into a buffer, send the ICM_DECOMPRESS_BEGIN message.

ICM_DRAW_BEGIN and ICM_DRAW_END do not nest. If your driver receives ICM_DRAW_BEGIN before decompression is stopped with ICM_DRAW_END, it should restart decompression with new parameters.

ICM_DRAW_BEGIN

See Also