Prepares the container for painting, gets the control's client area, then calls the control class's OnDrawAdvanced method.
LRESULT OnPaint(
   UINT /* nMsg */,
   WPARAM wParam,
   LPARAM /* lParam */,
   BOOL& /* lResult */ 
);
Parameters
- nMsg 
 Reserved.
- wParam 
 An existing HDC.
- lParam 
 Reserved.
- lResult 
 Reserved.
Return Value
Always returns zero.
Remarks
If wParam is not NULL, OnPaint assumes it contains a valid HDC and uses it instead of CComControlBase::m_hWndCD.
Requirements
Header: atlctl.h