using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Windows.Forms;
namespace xxx
{
static class Program
{
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
//获取当前进程
Process current = Process.GetCurrentProcess();
//获取所有与当前进程名称相同的进程
Process[] processArr = Process.GetProcessesByName(current.ProcessName);
foreach (Process process in processArr)
{
//和当前进程路径相同但ID不同
if (process.MainModule.FileName == current.MainModule.FileName && process.Id != current.Id)
{
//显示已打开的程序窗口,可搜索ShowWindowAsync的更多参数
ShowWindowAsync(process.MainWindowHandle, 1);
//将窗口放置最前端
SetForegroundWindow(process.MainWindowHandle);
//退出当前程序/进程
return;
}
}
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
}
[DllImport("User32.dll")]
private static extern bool ShowWindowAsync(IntPtr hWnd, int cmdShow);
[DllImport("User32.dll")]
private static extern bool SetForegroundWindow(IntPtr hWnd);
}
}