C的dll回调C#函数 - .NET技术 / C#

c dll 接口代码
C/C++ code:

//回调函数
//times是回调次数
ZOKE_DLL_EXPORT int zoke_callback(test_object* object, int (*callback)(int), int times);



c#代码
C# code:


[DllImport("dll_test.dll", CharSet = CharSet.Ansi)]
unsafe public static extern int zoke_callback(test_object* obj, callback mycallback, int times);

public delegate int callback(int a);

private void button2_Click(object sender, EventArgs e)
{
unsafe
{
Class2.callback myCallBack = new Class2.callback(callbackfunc);

MessageBox.Show(myCallBack.ToString());
int result = Class2.zoke_callback(tobj, myCallBack, 1);
MessageBox.Show(result.ToString());


}
}

private int callbackfunc(int a)
{
MessageBox.Show(a.ToString());
return 10;
}




点击事件时出错：尝试读取或写入受保护的内存。这通常指示其他内存已损坏。估计是callback mycallback的问题，请高手出来帮忙一下。

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抢个沙发哈！我是新手！