高分紧急求助：运行一个程序前判断该程序是否已经运行，如果运行则不再运行！怎样判断？？

[trueman3000]

高分紧急求助：运行一个程序前判断该程序是否已经运行，如果运行则不再运行！怎样判断？？

[jinjazz]

var
hmutex:hwnd;
ret:integer;
begin
Application.Initialize;
hmutex:=createmutex(nil,false,'project1');
ret:=getlasterror;
if ret<>error_already_exists then
begin
Application.CreateForm(TForm1, Form1);
end
else
begin
messagedlg('程序已运行。',mtinformation,[mbok],0);
releasemutex(hmutex);
end;

[xixuemao]

program Project1;

uses
Forms,
Windows,
Unit1 in 'Unit1.pas' {Form1};

{$R *.res}
var
hMutex:hWnd;
begin
Application.Initialize;
Application.Title:='test';
hMutex:=CreateMutex(nil,false,'test');
if GetLastError<>Error_Already_Exists then
begin
Application.CreateForm(TForm1, Form1);
Application.Run;
end
else
begin
Application.MessageBox('本程序只允许同时运行一个','Error');
ReleaseMutex(hMutex);
end;
end.