RgnChange example for C++ Builder

The following code for the RasterView RgnChange event updates a text box using the GetRgnArea method. You can test it by adding a text box for the lesson described in Outlining, Dragging, and Pasting a Region.

void __fastcall TForm1::LEADRasterView1RgnChange (TObject *Sender)
{
   AnsiString MyText;

   MyText= "Number of pixels in region: ";
   MyText= MyText + IntToStr((int)LEADRasterView1->Raster->GetRgnArea ());
   ShowMessage (MyText);
}