C#判断某程序是否运行的方法

[DllImport("user32.dll")]private static extern boolSetForegroundWindow(IntPtr hWnd);[DllImport("user32.dll")]private static extern bool ShowWindowAsync(IntPtr hWnd, int nCmdShow);[DllImport("user32.dll")]private static extern bool IsIconic(IntPtr hWnd);// 消息函数[DllImport("user32.dll", EntryPoint = "PostMessageA")]public static extern bool PostMessage(IntPtr hWnd, int Msg, int wParam, int lParam);[DllImport("user32.dll")]public static extern IntPtr FindWindow(string strclassName, string strWindowName);[DllImportAttribute("user32.dll")]public static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);public const int WM_SYSCOMMAND = 0x0112;public const int SC_MAXIMIZE = 0xF030;private string exeName = "SaoMiaoApp";public void SetForm(){  Process[] processes = Process.GetProcessesByName(exeName);  if (processes.Length > 0)  { IntPtr hWnd = processes[0].MainWindowHandle; if (IsIconic(hWnd))   ShowWindowAsync(hWnd, 9);// 9就是SW_RESTORE标志，表示还原窗体 //SendMessage(hWnd, WM_SYSCOMMAND, SC_MAXIMIZE, 0); SetForegroundWindow(hWnd);  }  else  { Process.Start(exeName + ".exe");  }}