SetOpacity method
Sets the opacity of the foreground surface.
Syntax
HRESULT retVal = object.SetOpacity(Opacity);
Parameters
Opacity [in]
Type: floatValue that indicates the opacity of the foreground surface. Values can range from 0.0 (fully transparent) to 1.0 (fully opaque).
Remarks
The opacity value is applied to the foreground surface when it is composited over the background surface.