using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;
using System.Diagnostics;
using System.Runtime.InteropServices;
namespace WindowsFormsApplication2
{
static class Program
{
[DllImport("user32.dll", EntryPoint = "SetForegroundWindow")]
public static extern int SetForegroundWindow(IntPtr hwnd);
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Process[] p = Process.GetProcessesByName(Process.GetCurrentProcess().ProcessName);
//防止程序启动多次，只有一个运行的实例
if (p.Length > 1)
{
//将之前启动的窗体显示出来。
SetForegroundWindow(p[1].MainWindowHandle);
return;//退出软件
}
//正常情况下的窗体显示
Application.Run(new Form1());
}
}
}
using System;
using System.Collections.Generic;
using System.Windows.Forms;
using System.Diagnostics;
using System.Runtime.InteropServices;
namespace WindowsApplication1
{
static class Program
{
[DllImport("user32.dll", EntryPoint="ShowWindow")]
public static extern int ShowWindow(IntPtr hwnd, int nCmdShow);
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Process[] p = Process.GetProcessesByName(Process.GetCurrentProcess().ProcessName);
//防止程序启动多次，只有一个运行的实例
if (p.Length > 1)
{
//将之前启动的窗体显示出来。
ShowWindow(p[1].MainWindowHandle, 1);
return;//退出软件
}
//正常情况下的窗体显示
Application.Run(new Form1());
}
}
}
