如何让应用程序只有一个实例在运行

using System; using System.Runtime.InteropServices; using System.Windows.Forms; using System.Diagnostics; using System.Reflection; public class OneInstnace { [STAThread] public static void Main() { //得到正在运行的例程 Process instance = RunningInstance(); if (instance == null) { //如果没有其它例程，就新建一个窗体 Application.Run (new Form()); } else { //处理发现的例程 HandleRunningInstance(instance); } } public static Process RunningInstance() { Process current = Process.GetCurrentProcess(); Process[] processes = Process.GetProcessesByName (current.ProcessName); //遍历正在有相同名字运行的例程 foreach (Process process in processes) { //忽略现有的例程 if (process.Id != current.Id) { //确保例程从EXE文件运行 if (Assembly.GetExecutingAssembly().Location.Replace("/", "//") == current.MainModule.FileName) { //返回另一个例程实例 return process; } } } //没有其它的例程，返回Null return null; } public static void HandleRunningInstance(Process instance) { //确保窗口没有被最小化或最大化 ShowWindowAsync (instance.MainWindowHandle , WS_SHOWNORMAL); //设置真实例程为foreground window SetForegroundWindow (instance.MainWindowHandle); } [DllImport("User32.dll")] private static extern bool ShowWindowAsync( IntPtr hWnd, int cmdShow); [DllImport("User32.dll")] private static extern bool SetForegroundWindow(IntPtr hWnd); private const int WS_SHOWNORMAL = 1; }如何在应用程序中运行一个EXE程序
[C#] Process proc = new Process(); proc.StartInfo.FileName = @"Notepad.exe"; proc.StartInfo.Arguments = ""; proc.Start(); [VB.NET] Dim proc As New Process() proc.StartInfo.FileName = "Notepad.exe" proc.StartInfo.Arguments = "" proc.Start()