WINCE.NET中程序只运行一次

using System;
using System.Runtime.InteropServices;

class Mutex
{
    [DllImport("coredll.Dll")]
    private static extern int GetLastError();

    [DllImport("coredll.Dll")]
    private static extern int ReleaseMutex(IntPtr hMutex);

    [DllImport("coredll.Dll")]
    private static extern IntPtr CreateMutex(
    SECURITY_ATTRIBUTES lpMutexAttributes,
    bool bInitialOwner, string lpName);

    [StructLayout(LayoutKind.Sequential)]
    public class SECURITY_ATTRIBUTES
    {
        public int nLength;
        public int lpSecurityDescriptor;
        public int bInheritHandle;
    }

    private const int ERROR_ALREADY_EXISTS = 0183;

    public static void Run()
    {
        IntPtr hMutex = CreateMutex(null, false, "ZJS_FJ");
        if (GetLastError() != ERROR_ALREADY_EXISTS)
        {
            System.Windows.Forms.Application.Run(new Form1());
            return;
        }
        else
        {
            ReleaseMutex(hMutex);
            return;
        }
    }
} // class
 

public class Mutex
{
[DllImport("coredll.dll", EntryPoint = "CreateMutex", SetLastError = true)]
public static extern IntPtr CreateMutex(
IntPtr lpMutexAttributes,
bool InitialOwner,
string MutexName);

[DllImport("coredll.dll", EntryPoint = "ReleaseMutex", SetLastError = true)]
public static extern bool ReleaseMutex(IntPtr hMutex);

private const int ERROR_ALREADY_EXISTS = 0183;

/// <summary>
/// 判断程序是否已经运行
/// </summary>
/// <returns>
/// true: 程序已运行，则什么都不做
/// false: 程序未运行，则启动程序
/// </returns>
public static bool IsExist()
{
string strAppName = 
System.Reflection.Assembly.GetExecutingAssembly().GetName().Name;
IntPtr hMutex = CreateMutex(IntPtr.Zero, true, strAppName);
if (hMutex == IntPtr.Zero)
throw new ApplicationException("Failure creating mutex: "
+ Marshal.GetLastWin32Error().ToString("X"));

if (Marshal.GetLastWin32Error() == ERROR_ALREADY_EXISTS)
{
ReleaseMutex(hMutex);
return true;
}
return false;
}
} // class