如何使用Delphi检查进程是否正在运行？ [英] How to check if a process is running using Delphi?

问题描述

类似于此问题，但在Delphi中：

Similar to this question, but in Delphi:

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

我有一个更新程序，我希望它检查要更新的程序当前未运行，最好检查所有用户，而不仅仅是当前用户。

I have an updater program, I want it to check the program its about to update is not currently running, preferably it would check all users, not just current user.

推荐答案

来自： 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;

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