CD2DBrush::GetOpacity
Visual Studio 2010 SP1 is required.
Gets the degree of opacity of this brush
FLOAT GetOpacity() const;
Return Value
A value between zero and 1 that indicates the opacity of the brush. This value is a constant multiplier that linearly scales the alpha value of all pixels filled by the brush. The opacity values are clamped in the range 0 to 1 before they are multiplied together
Requirements
Header: afxrendertarget.h