ICM_DRAW_BEGIN message
The ICM_DRAW_BEGIN message notifies a rendering driver to prepare to draw data.
ICM_DRAW_BEGIN
wParam = (DWORD) (LPVOID) &icdrwBgn;
lParam = sizeof(ICDRAW);
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icdrwBgn
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Pointer to an ICDRAWBEGIN structure containing the input format.
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lParam
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Size, in bytes, of ICDRAWBEGIN.
Returns ICERR_OK if the driver supports drawing the data to the screen in the specified manner and format, or an error code otherwise. Possible error values include the following.
Value | Meaning |
---|---|
ICERR_BADFORMAT | Input or output format is not supported. |
ICERR_NOTSUPPORTED | Driver does not draw directly to the screen or does not support this message. |
If you want the driver to decompress data into a buffer, send the ICM_DECOMPRESS_BEGIN message.
The ICM_DRAW_BEGIN and ICM_DRAW_END messages 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.
Requirement | Value |
---|---|
Minimum supported client |
Windows 2000 Professional [desktop apps only] |
Minimum supported server |
Windows 2000 Server [desktop apps only] |
Header |
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