C# Kernel32 导出函数

/// <summary>
    /// Kernel32导出函数
    /// </summary>
    public class Kernel32
    {
        [DllImport("KERNEL32.DLL ")]
        public static extern IntPtr CreateToolhelp32Snapshot(uint flags, uint processid);

        [DllImport("KERNEL32.DLL ")]
        public static extern int CloseHandle(IntPtr handle);

        [DllImport("KERNEL32.DLL ")]
        public static extern int Process32First(IntPtr handle, ref   ProcessEntry32 pe);

        [DllImport("KERNEL32.DLL ")]
        public static extern int Process32Next(IntPtr handle, ref   ProcessEntry32 pe);


        [StructLayout(LayoutKind.Sequential)]
        public struct ProcessEntry32
        {
            public uint dwSize;
            public uint cntUsage;
            public uint th32ProcessID;
            public IntPtr th32DefaultHeapID;
            public uint th32ModuleID;
            public uint cntThreads;
            public uint th32ParentProcessID;
            public int pcPriClassBase;
            public uint dwFlags;

            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)]
            public string szExeFile;
        };
    }