- if ( wxWindow *win = wxFindWinFromHandle(hWnd) )
- hbr = MSWGetBgBrush(pDC, win);
+ wxWindow *win = wxFindWinFromHandle( hWnd );
+ if ( !win )
+ {
+ // If this HWND doesn't correspond to a wxWindow, it still might be
+ // one of its children for which we need to set the background
+ // brush, e.g. this is the case for the EDIT control that is part
+ // of wxComboBox. Check for this by asking the parent if it has it:
+ HWND parent = ::GetParent(hWnd);
+ if ( parent )
+ {
+ wxWindow *winParent = wxFindWinFromHandle( parent );
+ if( winParent && winParent->ContainsHWND( hWnd ) )
+ win = winParent;
+ }
+ }
+
+ if ( win )
+ hbr = win->MSWGetBgBrush(pDC);