BCGControlBar Pro for MFC
BOOL BCGPGLOBAL_DATA::IsWindowsLayerSupportAvailable ( ) const
inline

Tells whether the current OS supports layered windows.

Returns
Nonzero if layered windows are supported; otherwise 0.

This function is used to determine whether the current OS supports layered windows. If layered windows are supported, then "smart docking" markers use layered windows.