oWin:drawitem( <nIdCtl, <nItemStruc> ) -> <void>

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 PARAMETER:

  <nIdCtl>     Specifies the identifier of the owner-drawn control that has
               sent the WM_DRAWITEM message. This parameter is zero if the
               message was sent by a menu. 

  <nItemStruc> Is a pointer to the DRAWITEMSTRUCT structure that 
               contains information about the owner drawn control to be 
               drawn and the type of drawing required. 
               This ( C-)Structure is defined as following and stored as a 
               clipper string:
               
               DRAWITEMSTRUCT:

                INT CtlType    Specifies the control type ( button, box .. )
                INT CtlID      Control Identifier
                INT itemID     Menu item identifier
                INT itemAction Menu drawing action ( on focus, select..)
                INT itemState  Menu status ( checked, disabled .. )
                HWND hwndItem  window ( controls ) or menu handle
                HDC hDC        device context for drawing operation
                RECT rcItem    boundary rectangle of the control
                DWORD itemData value assigned to the control


 DESCRIPTION:
  
  The WM_DRAWITEM message is sent to the owner of an owner-drawn 
  button, combo box, list box, or menu when a visual aspect of the button, 
  combo box, list box, or menu has changed. 
  This method is the receiver of that message, and sends it directly to
  to the object of the adressed control which then is responisble for
  the repainting.