How to get the bitmap on a hidden TWinControl (Views: 27)
Problem/Question/Abstract: I want to get a bitmap from the Device Context of a TWinControl that is hidden. Is this possible? I know the handle, but GetDC, Canvas.copyrect etc. return the desktop image. Answer: procedure TForm1.Button2Click(Sender: TObject); var FControlCanvas: TControlCanvas; FBitmap: TBitmap; begin FControlCanvas := TControlCanvas.Create; try FControlCanvas.Control := StringGrid1; FBitmap := TBitmap.Create; try FBitmap.Width := FControlCanvas.Control.Width; FBitmap.Height := FControlCanvas.Control.Height; FBitmap.Canvas.CopyRect(Rect(0, 0, FBitmap.Width, FBitmap.Height), FControlCanvas, Rect(0, 0, FBitmap.Width, FBitmap.Height)); Image1.Picture.Assign(FBitmap); finally FBitmap.Free; end; finally FControlCanvas.Free; end; end; |