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procedure TForm1.btn1Click(Sender: TObject);
var
DC,MemDC:HDC;
MemBitMap,OldBitMap:HBITMAP ;
GPGraph:TGPGraphics ;
GaugeImg:TGPImage ;
procedure DrawImage ;
begin
DC:=GetDC(Self.Handle);
MemDC :=CreateCompatibleDC(DC);
MemBitMap:=CreateCompatibleBitmap(DC,246,157);
OldBitMap :=SelectObject(MemDC,MemBitMap);
GPGraph:= TGPGraphics.Create(MemDC);
try
GaugeImg :=TGPImage.Create(WideString(ExtractFilePath(ParamStr(0))+'Images\guage.png'));
GPGraph.DrawImage(GaugeImg,0,0,GaugeImg.GetWidth,GaugeImg.GetHeight );
BitBlt(DC, 0, 0, 246, 157, MemDC, 0, 0, SRCCOPY);
finally
GaugeImg.Free ;
SelectObject(MemDC,OldBitMap);
DeleteDC(MemDC);
DeleteObject(MemBitMap);
ReleaseDC(Self.Handle,DC );
end;
end;
begin
DrawImage ;
end;