[code cpp]
sendto(H_Socket,s_buf,sizeof(s_buf),0,(SOCKADDR*)&H_addr,sizeof(H_addr));
ret = WSAAsyncSelect(R_Socket,Handle,WM_SOCKET,FD_READ);
[/code]


在執行WSAAsyncSelect後

請問WindowProc需要是需要我們自己去寫然後呼叫他嗎？

我在MSDN看好像是handle有訊息的話os就會自己杷WindowProc喚醒

底下是網路上找來的WindowProc，然後我是把Recvfrom寫在裡面，可是程式都不會進去裡面執行
[code cpp]
ULT CALLBACK WindowProc(HWND hDlg,UINT uMsg,WPARAM wParam, LPARAM lParam)
{
switch(uMsg)
{
case WM_PAINT:
// Process window paint messages
break;
case WM_SOCKET:
// Determine whether an error occurred on the
// socket by using the WSAGETSELECTERROR() macro
if (WSAGETSELECTERROR(lParam))
{
// Display the error and close the socket
closesocket( (SOCKET) wParam);
break;
}
// Determine what event occurred on the
// socket
switch(WSAGETSELECTEVENT(lParam))
{
case FD_WRITE:
// The socket in wParam is ready
// for sending data
break;
case FD_CLOSE:
// The connection is now closed
//
closesocket( (SOCKET)wParam);
break;
case FD_READ:
recvfrom(R_Socket,(LPSTR)&ERP,sizeof(ERP),0,(SOCKADDR*)&R_addr,&R_size);
break;
}
break;
}
return TRUE;
}
[/code]