BCGControlBar Pro for MFC
void CBCGPChartSurfaceSeries::SetSurfaceOpacity ( double  dblOpacity)

Sets surface opacity.

Call this method to set surface opacity. Unlike other charts, theme opacity does not affect surfaces.

dblOpacity is a value in range [0., 1.] , where 0 is completely transparent surface.

Parameters
dblOpacitySpecifies opacity.