This method changes the color key.
HRESULT SetColorKey( COLORKEY* pColorKey );
[out] Pointer to the color key value to be set. If successful, the actual color key value selected is copied to this parameter.
Returns an HRESULT value that depends on the implementation. HRESULT can be one of the following standard constants, or other values not listed.
|E_POINTER||Null pointer argument.|
|E_NOTIMPL||Method is not supported.|
|S_OK or NOERROR||Success.|
If you change the color key by using the IOverlay::SetColorKey method, all the advise links will receive an IOverlayNotify::OnColorKeyChange callback method with the new color.
When using IOverlay on a palettized display, a filter can either install a color key (using IOverlay::SetColorKey) or install a palette (using IOverlay::SetPalette), but not both. This is because color keys in this mode require a palette to be realized that would conflict with SetPalette. Color keys can be uninstalled by requesting a color key with the CK_NOCOLORKEY flag. Likewise, any palette installed through SetPalette can be uninstalled by calling SetPalette and passing in null parameters (that is, SetPalette(0,NULL)).
DirectShow applications and DirectShow filters have different include file and link library requirements. See Setting Up the Build Environment for more information.
OS Versions: Windows CE 2.12 and later. Version 2.12 requires DXPAK 1.0 or later.
Last updated on Wednesday, April 13, 2005
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