Question

我正在尝试将C ++ API转换为VB.Net，但这个功能太难了，我不知道它是如何工作的。

以下是此功能的API文档：

void RemoteDllSetReceiver(void *inst, on_received_buffer_t received_buf_cb);

设置回调函数以接收来自DLL的通知。回调的原型是：

typedef bool (*on_received_buffer_t)(void* inst, const unsigned char *buffer, unsigned int size);

其中

inst是最初传递给RemoteDllSetReceiver
缓冲区＆amp; size包含远程协议中定义的通知文本。

注意：通知可能会到达不同的线程（例如网络，计时器，音频）。

我无法想象我用on_received_buffer_t做什么，它必须是委托吗？就像你可以阅读，这个函数返回DLL的通知，如连接状态，用户ID ......

任何帮助将不胜感激，谢谢。

Answer 1

我必须补充说我正在使用Visual Studio 2008和Compact Framework 3.5。我目前的工作是：

P / Invoke功能：

Private Declare Function RemoteDllSetReceiver Lib "remote_dll.dll" (ByVal inst As IntPtr, ByVal received_buf_cb As on_received_buffer_t) As Integer

委托给receive_buffer_t

Public Delegate Function on_received_buffer_t(ByVal inst As IntPtr, ByVal buffer() As Byte, ByVal size As Long) As Boolean

我在我的代码中称呼它：

RemoteDllSetReceiver(IntPtr.Zero, AddressOf ReceiveMessage)

ReceiveMessage功能：

Public Shared Function ReceiveMessage(ByVal inst As IntPtr, ByVal buffer() As Byte, ByVal size As Long) As Boolean

    MsgBox(buffer.ToString())

End Function

由于

将回调函数从C ++转换为VB.Net

1 个答案: