by Antonio Linares » Tue Oct 29, 2024 7:50 am
Dear Silvio,
Class TGroup is based on a standard Windows class, so we use its default paint procedure:
CallWindowProc( ::nOldProc, ::hWnd, WM_PAINT, ::hDC, 0 )
and the change of the color line is not supported by Windows
A user defined Class TGroupEx should be implemented to have control on that