This function brings the specified window to the top of the z-order. If the window is a top-level window, it is activated. If the window is a child window, the top-level parent window associated with the child window is activated. BOOL BringWindowToTop( HWND hWnd );
先要获取你想要窗体的句柄 你可以使用 [DllImport("user32.dll", SetLastError = true)] public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);然后使用 [DllImport("User32.dll", CharSet = CharSet.Auto)] public static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong); 让窗体最大化 [DllImport("user32.dll", CharSet = CharSet.Auto)] public static extern bool SetForegroundWindow(IntPtr hWnd); 记活窗体.. [DllImport("user32.dll", CharSet = CharSet.Auto)] public static extern IntPtr SetFocus(IntPtr hWnd); 设置焦点
完整的:using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; using System.Diagnostics; using System.Reflection; using System.Runtime.InteropServices;
public class MainForm : System.Windows.Forms.Form { private const int WS_SHOWNORMAL = 1; [DllImport("User32.dll")] private static extern bool ShowWindowAsync(IntPtr hWnd, int cmdShow); [DllImport("User32.dll")] private static extern bool SetForegroundWindow(IntPtr hWnd);
public MainForm() { InitializeComponent(); } /// <summary> /// 应用程序的主入口点。 /// </summary> [STAThread] static void Main() { Process instance = GetRunningInstance(); if(instance == null) { Application.Run(new MainForm()); } else { HandleRunningInstance(instance); } } /// <summary> /// 获取应用程序的实例,没有其它的例程,返回Null /// </summary> /// <returns></returns> public static Process GetRunningInstance() { 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; } return null; } /// <summary> /// 获取窗口句柄 /// </summary> /// <param name="instance"></param> 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); } }
HWND hWnd
);
public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);然后使用 [DllImport("User32.dll", CharSet = CharSet.Auto)]
public static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);
让窗体最大化 [DllImport("user32.dll", CharSet = CharSet.Auto)]
public static extern bool SetForegroundWindow(IntPtr hWnd);
记活窗体.. [DllImport("user32.dll", CharSet = CharSet.Auto)]
public static extern IntPtr SetFocus(IntPtr hWnd);
设置焦点
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Diagnostics;
using System.Reflection;
using System.Runtime.InteropServices;
public class MainForm : System.Windows.Forms.Form
{
private const int WS_SHOWNORMAL = 1;
[DllImport("User32.dll")]
private static extern bool ShowWindowAsync(IntPtr hWnd, int cmdShow);
[DllImport("User32.dll")]
private static extern bool SetForegroundWindow(IntPtr hWnd);
public MainForm()
{
InitializeComponent();
}
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
Process instance = GetRunningInstance();
if(instance == null)
{
Application.Run(new MainForm());
}
else
{
HandleRunningInstance(instance);
}
}
/// <summary>
/// 获取应用程序的实例,没有其它的例程,返回Null
/// </summary>
/// <returns></returns>
public static Process GetRunningInstance()
{
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;
}
return null;
}
/// <summary>
/// 获取窗口句柄
/// </summary>
/// <param name="instance"></param>
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);
}
}
http://hi.baidu.com/csrwgs/blog/item/d0f92912ca7012d8f7039e13.htmlhttp://hi.baidu.com/csrwgs/blog/item/33f88d7204acc3148701b0fc.html