请问各位大侠，c#中如果通过桌面快捷方式显示隐藏窗体

[ch67259]

我的设计为，点击窗体的关闭按钮，使其隐藏至任务栏的托盘中。这是一个单实例的程序，运行时，需要在程序的入口处判断是否已经有该进程在运行，如果没有则正常运行；已有程序则根据该进程的句柄。可是如果已运行该程序，且程序隐藏在托盘中（通过form.hide（）方法），则无法通过快捷方式将其显示。我发现迅雷和msn都可以实现类似功能，希望各位能给予解答。

我尝试使用API使窗体显示，可是只能在最小化时显示，隐藏后则无法显示。以下是程序入口处发现已有进程运行时的显示窗体代码
其中instance.MainWindowHandle表示进程的主窗口句柄。
public static void HandleRunningInstance(Process instance)
{
SetForegroundWindow(instance.MainWindowHandle);
ShowWindowAsync(instance.MainWindowHandle, 9);
SendMessage(instance.MainWindowHandle, 0x18, GetFocus(),IntPtr.Zero);
}

[DllImport("User32.dll")]
private static extern bool ShowWindowAsync(IntPtr hWnd, int cmdShow);
[DllImport("User32.dll")]
private static extern bool SetForegroundWindow(IntPtr hWnd);
[DllImport("User32.dll")]
private static extern IntPtr SendMessage(IntPtr hwnd, uint msg, IntPtr wParam, IntPtr lParam);
[DllImport("User32.dll")]
private static extern IntPtr GetFocus();

[pennymay]

帮顶, 我现在也想知道这个答案~!~

[pennymay]

using   System;  
using   System.Runtime.InteropServices;  
using   System.Windows.Forms;  
using   System.Diagnostics;  
using   System.Reflection;


namespace Wenita
{
    static class Program
    {

        [STAThread]
        public static void Main()
        {
            //get process is running
            Process instance = RunningInstance();
            if (instance == null)
            {
                //if not exist, create a new process
                Application.EnableVisualStyles();
                Application.SetCompatibleTextRenderingDefault(false);
                Application.Run(new FrmMainpage());
            }
            else
            {
                //handle found process 
                HandleRunningInstance(instance);
            }
        }
        public static Process RunningInstance()
        {
            Process current = Process.GetCurrentProcess();
            Process[] processes = Process.GetProcessesByName(current.ProcessName);

            //foreach all process
            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;
                    }
                }
            }

            //not any process, return 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;
    }
}

现在如何在窗体被隐藏的时候, 再把他们SHOW出来???