Winapi, warning Опции

[klem4]

procedure WinMain; 
  const szClassName='Shablon';
  var   wndClass:TWndClassEx;
        hWnd: THandle;
        msg:TMsg;
begin
  wndClass.cbSize:=sizeof(wndClass);
  wndClass.style:=cs_hredraw or cs_vredraw;
  wndClass.lpfnWndProc:=@WndProc;
  wndClass.cbClsExtra:=0;
  wndClass.cbWndExtra:=0;
  wndClass.hInstance:=hPrevInst; //[Warning] Symbol 'HPrevInst' is deprecated
 ...

Что это за warning ?

компилировал соответсвенно в делфи 6

[volvo]

To: klem4

The symbol is tagged (using the deprecated hint directive) as no longer current and is maintained for compatibility only. You should consider updating your source code to use another symbol, if possible.