🚀 go-pugleaf

"Ed Mulroy [TeamB]" <ed@mulroyREMOVETHESECHARS.org> wrote:
> When you receive the WM_NCPAINT message the wParam argument
> is a handle to the region to be painted. All non-client paint
> messages give you a rectangular region and a call to GetRegionData
> can be used to find the rectangular coordinates [...]

I tried to GetRegionData but there's never anything there which
I know is not the case so my code must be in error. Can you
tell me what I'm doing wrong please?

~ JD
 

void __fastcall TForm1::NewWindowProc( TMessage& Message )
{
    OldWindowProc( Message );
    if( Message.Msg == WM_NCPAINT )
      {
          char *Buffer = NULL;
          RGNDATA *pRgnData;
          HRGN hrgn = (HRGN) Message.WParam;
          DWORD dwCount = GetRegionData( hrgn, 0, NULL );

          if( dwCount > 0 )
            {
                Label1->Caption = "Made it to here";
                Buffer = new char[ dwCount ];
                pRgnData = reinterpret_cast<RGNDATA*>( Buffer );
                GetRegionData( hrgn, dwCount, pRgnData );
                RECT *R = reinterpret_cast<RECT*>(pRgnData + sizeof( RGNDATAHEADER ));
                for(unsigned int x = 0; x < pRgnData->rdh.nCount; x++, R++)
                  {
                      // fill the rect ( R ) for visual confirmation
                  }
            }
          if( Buffer ) delete Buffer;
      }
}