waitforinputidleu.pas

Delphi Win32核心API参考光盘源码 本书包含了常用的Windows API函数

unit WaitForInputIdleU;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.Button1Click(Sender: TObject);
var
  StartUpInfo: TStartUpInfo;           // holds startup information
  ProcessInfo: TProcessInformation;    // holds process information
begin
  {initialize the startup info structure}
  FillChar(StartupInfo, SizeOf(TStartupInfo), 0);
  with StartupInfo do
  begin
    cb := SizeOf(TStartupInfo);
    dwFlags := STARTF_USESHOWWINDOW;
    wShowWindow := SW_SHOWNORMAL;
  end;

  {launch another copy of Delphi}
  CreateProcess('c:\Program Files\Borland\Delphi6\Bin\Delphi32.exe', nil, nil,
                nil, False, NORMAL_PRIORITY_CLASS, nil, nil,
                StartupInfo, ProcessInfo);

  {this will cause the application to become unresponsive until Delphi
   has completely finished loading.  the application will not even
   accept focus}
  WaitForInputIdle(ProcessInfo.HProcess, infinite);

  {indicates that Delphi has finished loading}
  ShowMessage('Responsiveness Restored');
end;

end.