Delphi实现截屏功能
** 功能: 截取屏幕中的指定区域** 输入参数:
** LeftPos :左坐标
** TopPos :上坐标
** RightPos:右坐标
** BottomPos :底部坐标
** author : liubin
** datetime : 2010-10-01
***********************************}
procedure ScreenCap(LeftPos,TopPos,RightPos,BottomPos:integer);
var
RectWidth,RectHeight:integer;
SourceDC,DestDC,Bhandle:integer;
Bitmap:TBitmap;
MyJpeg: TJpegImage;
Stream:TMemoryStream;
begin
MyJpeg:= TJpegImage.Create;
RectWidth:=RightPos-LeftPos;
RectHeight:=BottomPos-TopPos;
SourceDC:=CreateDC('DISPLAY','','',nil);
DestDC:=CreateCompatibleDC(SourceDC);
Bhandle:=CreateCompatibleBitmap(SourceDC,
RectWidth,RectHeight);
SelectObject(DestDC,Bhandle);
BitBlt(DestDC,0,0,RectWidth,RectHeight,SourceDC,
LeftPos,TopPos,SRCCOPY);
Bitmap:=TBitmap.Create;
Bitmap.Handle:=BHandle;
Stream := TMemoryStream.Create;
Bitmap.SaveToStream(Stream);
Stream.Free;
try
MyJpeg.Assign(Bitmap);
MyJpeg.CompressionQuality:=70;
MyJpeg.Compress;
MyJpeg.SaveToFile('C:\MyJPEGImage.JPG');
finally
MyJpeg.Free;
Bitmap.Free;
DeleteDC(DestDC);
ReleaseDC(Bhandle,SourceDC);
end;
end;
摘自 #Define
补充:软件开发 , Delphi ,