C#调用SetEvent-EventModify

C# 如果想使用SetEvent，但是cordll并没有导出这个函数。下面是在mobile中使用的情况。

windows mobile 系统coredll.dll并没有真正暴露SetEvent等函数，而是以EventModify替代了三个API。

其原型应该是EventModify(HANDLE ,DWROD)

第二个参数的定义如下：

 

#define EVENT_PULSE     1
#define EVENT_RESET     2
#define EVENT_SET         3

 

样例：

C# Signature:
using HANDLE = System.IntPtr;
...
[DllImport("coredll.dll", SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool EventModify(HANDLE hEvent, [In, MarshalAs(UnmanagedType.U4)] int dEvent);


VB Signature:
Declare Function EventModify Lib "coredll.dll" (ByVal hEvent As IntPtr, ByVal func As Integer) As Boolean
Declare Function EventModify Lib "coredll.dll" (TODO) As TODO


User-Defined Types:
private enum EventFlags
{
     EVENT_PULSE = 1,
     EVENT_RESET = 2,
     EVENT_SET = 3
}


Alternative Managed API:
Do you know one? Please contribute it!

Notes:
None.

Tips & Tricks:
Please add some!

Sample Code:
using System;

using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using HANDLE = System.IntPtr;

namespace Test
{
     class Program
     {
        [DllImport("coredll.dll", SetLastError = true, CallingConvention = CallingConvention.Winapi, CharSet = CharSet.Auto)]
        public static extern HANDLE CreateEvent(HANDLE lpEventAttributes, [In, MarshalAs(UnmanagedType.Bool)] bool bManualReset, [In, MarshalAs(UnmanagedType.Bool)] bool bIntialState, [In, MarshalAs(UnmanagedType.BStr)] string lpName);

        [DllImport("coredll.dll", SetLastError = true, CallingConvention = CallingConvention.Winapi, CharSet = CharSet.Auto)]
        [return: MarshalAs(UnmanagedType.Bool)]
        public static extern bool CloseHandle(HANDLE hObject);

        [DllImport("coredll.dll", SetLastError = true)]
        [return: MarshalAs(UnmanagedType.Bool)]
        public static extern bool EventModify(HANDLE hEvent, [In, MarshalAs(UnmanagedType.U4)] int dEvent);

        public enum EventFlags
        {
                PULSE = 1,
                RESET = 2,
                SET = 3
        }
        private static bool SetEvent(HANDLE hEvent)
        {
                return EventModify(hEvent, (int)EventFlags.SET);
        }
        private static bool ResetEvent(HANDLE hEvent)
        {
                return EventModify(hEvent, (int)EventFlags.RESET);
        }

        static void Main(string[] args)
        {
                IntPtr p = CreateEvent(HANDLE.Zero, false, true, string.Empty);
                SetEvent(p);
                ResetEvent(p);
                CloseHandle(p);
        }
     }
}