如何使用Delphi检查进程是否运行？

类似于这个问题,但在Delphi中：

How do I find out if a process is already running using c#?

我有一个更新程序,我希望它检查程序它即将更新是不是当前正在运行,最好是检查所有的用户,而不只是当前的用户.

解决方法

从： http://www.delphitricks.com/source-code/windows/check_if_a_process_is_running.html

uses TlHelp32; 

    function processExists(exeFileName: string): Boolean; 
var 
  ContinueLoop: BOOL; 
  FSnapshotHandle: THandle; 
  FProcessEntry32: TProcessEntry32; 
begin 
  FSnapshotHandle := Createtoolhelp32Snapshot(TH32CS_SNAPPROCESS,0); 
  FProcessEntry32.dwSize := SizeOf(FProcessEntry32); 
  ContinueLoop := Process32First(FSnapshotHandle,FProcessEntry32); 
  Result := False; 
  while Integer(ContinueLoop) <> 0 do 
  begin 
    if ((UpperCase(ExtractFileName(FProcessEntry32.szExeFile)) = 
      UpperCase(ExeFileName)) or (UpperCase(FProcessEntry32.szExeFile) = 
      UpperCase(ExeFileName))) then 
    begin 
      Result := True; 
    end; 
    ContinueLoop := Process32Next(FSnapshotHandle,FProcessEntry32); 
  end; 
  CloseHandle(FSnapshotHandle); 
end; 

procedure TForm1.Button1Click(Sender: TObject); 
begin 
  if processExists('notepad.exe') then 
    ShowMessage('process is running') 
  else 
    ShowMessage('process not running'); 
end;