Delphi图象截取编程示例(5)

3)抓取窗体或控件图片
抓取窗体或控件图片，即要用到一个新的Form2，参见《Delphi图象截取编程示例(7)》
在Main单元implementation的uses中添加Capture2。

[Capture Windows or Controls]窗体或控件抓图的Action 事件
procedure TMainForm.cptWindowsExecute(Sender: TObject);
var p:TPoint; Handles:HWnd;
begin
Inc(CaptureNum,1);
Application.Minimize ;
Delay(500);
FileName:=''''Capture'''' IntTOStr(CaptureNum);
FileName:=DefaultDirectory FileName;
with TForm2.Create(Application) do
try
if ShowModal=mrOK then
begin
CreateMDIChild(FileName,true);
StatusBar.SimpleText := FileName;
Delay(500);
ABitmap:=TBitmap.Create ;
GetCursorPos(P);
Handles:=WindowFromPoint(P);
ABitmap:=CaptureWindowImage(Handles);
Child.Image1.Picture.Bitmap:=ABitmap;
Child.ClientWidth := Child.Image1.Picture.Width ;
Child.ClientHeight:= Child.Image1.Picture.Height;
Child.HorzScrollBar.Range := Child.Image1.Picture.Width ;
Child.VertScrollBar.Range := Child.Image1.Picture.Height;
Child.Image1.Hint := ''''Height:'''' intToStr(child.Image1.Picture.Height) ''''pixels''''
'''' Width:'''' intToStr(child.Image1.Picture.Width) ''''pixels'''';
ABitmap.Free ;
end;
finally
Free;
Application.Restore ;
end;
end;

4)抓取 ICON 图片
抓取 ICON 图片，即要用到一个新的Form3，参见《Delphi图象截取编程示例(8)》
在Main单元implementation的uses中添加Capture3。
在Main单元添加私有过程CaptureICON :
procedure TMainForm.CaptureICON; // [二十]
begin
with TForm3.Create(Application) do
try
if ShowModal = mrOK then
with fRect do begin
if (Right>Left)and(Bottom>Top) then begin
Delay(300);
ABitmap:=TBitmap.Create ;
ABitmap.Assign(CaptureScreenRect(fRect));
Child.Image1.Picture.Bitmap:=ABitmap;
Child.HorzScrollBar.Range:=Child.Image1.Picture.Width;
Child.VertScrollBar.Range:=Child.Image1.Picture.Height;
ABitmap.Free;
end else begin
MessageDlg(''''边框选择错误，重试!'''',mtInformation,[mbOK],0);
Child.Close ;
Form3.Free ;
exit;
end;
end;
finally
Free;
end;
end;

[Capture ICON ] ICON 抓图的Action 事件
procedure TMainForm.cptIconExecute(Sender: TObject);
begin
Application.Minimize ;
Delay(400);
Inc(CaptureNum,1);
FileName:=''''Capture'''' intToStr(CaptureNum);
FileName:=DefaultDirectory FileName;
CreateMDIChild(FileName,true);
StatusBar.SimpleText := FileName;
CaptureICON;
Child.ClientWidth := Child.Image1.Picture.Width ;
Child.ClientHeight:= Child.Image1.Picture.Height;
Child.HorzScrollBar.Range := Child.Image1.Picture.Width ;
Child.VertScrollBar.Range := Child.Image1.Picture.Height;
Child.Image1.Hint := ''''Height:'''' intToStr(child.Image1.Picture.Height) ''''pixels''''
'''' Width:'''' intToStr(child.Image1.Picture.Width) ''''pixels'''';
Application.Restore ;
end;

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