BCGControlBar Pro for MFC
COLORREF CBCGPHotSpotImageCtrl::GetBackgroundColor ( ) const
inline

Retrieves the background color of a hot spot image control.

Returns
An RGB value specifying the current background color of the hot spot image control.

Use this function to determine the current background color of the hot spot image control. You need this color in case the control is placed on a resizable parent. You can fill the image surrounding area by this color.