Delphi技巧集六 （等待执行完一个外部程序再执行另一个程序）

http://www.cnblogs.com/kylskjb/archive/2008/08/10/1264799.html

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, 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

uses ShellAPI;  //注意

{$R *.dfm}

function ExecAppWait(AppName, Params: string): Boolean;
var
  ShellExInfo: TShellExecuteInfo;
begin
  FillChar(ShellExInfo, SizeOf(ShellExInfo), 0);
  with ShellExInfo do begin
    cbSize := SizeOf(ShellExInfo);
    fMask := see_Mask_NoCloseProcess;
    Wnd := Application.Handle;
    lpFile := PChar(AppName);
    lpParameters := PChar(Params);
    nShow := sw_ShowNormal;
  end;
  Result := ShellExecuteEx(@ShellExInfo);
  if Result then
    while WaitForSingleObject(ShellExInfo.HProcess, 100) = WAIT_TIMEOUT do
    begin
      Application.ProcessMessages;
      if Application.Terminated then Break;
    end;
end;

procedure TForm1.Button1Click(Sender: TObject);
const    { 连续运行下面这四个EXE文件 }
  EXEFILES : array[1..4] of string =
             ('calc.exe', 'mspaint.exe', 'Notepad.exe', 'wordpad.exe');
var
  Success: Boolean;
  InstanceID: THandle;
  I : integer;
begin
  for I := Low(EXEFILES) to High(EXEFILES) do
    begin
    Application.Minimize;
    Success := False;
    try
       Success := ExecAppWait(EXEFILES[I], '')
    finally
      Application.Restore;
      if not Success then
        ShowMessage(Format('Application %d failed: %s', [ I, EXEFILES[I] ]));
    end;
  end;
end;

end.