00401.txt

Delphi编程五大妙招源程序

1：如何添加桌面的快捷
    在Uses里面，添加ShlObj, ActiveX, ComObj这三个单元，就可以了，在这个例子里面，添加的是计算器的快捷方式。
procedure TForm1.Button1Click(Sender: TObject);
var
  tmpObject : IUnknown;
  tmpSLink : IShellLink;
  tmpPFile : IPersistFile;
  PIDL : PItemIDList;
  StartupDirectory : array[0..MAX_PATH] of Char;
  StartupFilename : String;
  LinkFilename : WideString;
begin
  StartupFilename := 'c:\windows\Calc.exe';
  tmpObject := CreateComObject(CLSID_ShellLink);
  tmpSLink := tmpObject as IShellLink;
  tmpPFile := tmpObject as IPersistFile;
  tmpSLink.SetPath(pChar(StartupFilename));
  tmpSLink.SetWorkingDirectory(pChar(ExtractFilePath(StartupFilename)));
  SHGetSpecialFolderLocation(0,
                             CSIDL_DESKTOPDIRECTORY,
                             PIDL);
  SHGetPathFromIDList(PIDL, StartupDirectory);
  LinkFilename := StartupDirectory + '\计算器.lnk';
  tmpPFile.Save(pWChar(LinkFilename),FALSE);
end;

2：做一个隐身程序：
再program里面添加一个Windows单元，同时定义一个ExtendedStyle : Integer，把
Application.Initialize;和 Application.CreateForm(TForm1, Form1);之间加上下面两句话
  ExtendedStyle := GetWindowLong(Application.Handle, GWL_EXSTYLE);
  SetWindowLong(Application.Handle, GWL_EXSTYLE, ExtendedStyle OR WS_EX_TOOLWINDOW
                AND NOT WS_EX_APPWINDOW);
就能让你的程序隐身。

3：屏蔽系统键
下面两句话就可以屏蔽系统键
  SystemParametersInfo(SPI_SETFASTTASKSWITCH, 1, @tmp, 0); //屏蔽 Alt-Tab
  SystemParametersInfo(SPI_SCREENSAVERRUNNING, 1, @tmp, 0); //屏蔽 Ctrl-Alt-Del　　

下面两句话就又可以打开系统键
  SystemParametersInfo(SPI_SETFASTTASKSWITCH, 0, @tmp, 0); //打开 Alt-Tab
  SystemParametersInfo(SPI_SCREENSAVERRUNNING, 0, @tmp, 0); //打开 Ctrl-Alt-Del