本例效果图:
![](https://www.cnblogs.com/images/cnblogs_com/del/142973/o_87291.gif)
代码文件:
unit Unit1; interface uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls; type TForm1 = class(TForm) Button1: TButton; procedure Button1Click(Sender: TObject); end; var Form1: TForm1; implementation {$R *.dfm} uses GDIPOBJ, GDIPAPI, UrlMon; procedure TForm1.Button1Click(Sender: TObject); const TestPath = 'c:\temp\net.gif'; {下载后临时存放} DownUrl = 'http://del.cnblogs.com/Images/xml.gif'; {要下载的文件} var img: TGPImage; g: TGPGraphics; begin if UrlDownloadToFile(nil, DownUrl, TestPath, 0, nil) = 0 then begin img := TGPImage.Create(TestPath); g := TGPGraphics.Create(Canvas.Handle); g.DrawImage(img, 10, 10, img.GetWidth, img.GetHeight); g.Free; img.Free; end; end; end.窗体文件:
object Form1: TForm1 Left = 0 Top = 0 Caption = 'Form1' ClientHeight = 127 ClientWidth = 249 Color = clBtnFace Font.Charset = DEFAULT_CHARSET Font.Color = clWindowText Font.Height = -11 Font.Name = 'Tahoma' Font.Style = [] OldCreateOrder = False PixelsPerInch = 96 TextHeight = 13 object Button1: TButton Left = 152 Top = 80 Width = 75 Height = 25 Caption = 'Button1' TabOrder = 0 OnClick = Button1Click end end