我正在使用 Visual Studio 2010 开发 4 个应用程序(使用 Internet 中的已建立示例):C++ MFC 中的 2 个(命名为:SenderCpp 和 ReceiverCpp)和 C# 中的 2 个(命名为:SenderCsh 和 ReceiverCsh)来测试 WM_DATACOPY 进程间通信。
我的目标是让 C++ 应用程序“SenderCpp”向 C# 应用程序“ReceiverCsh”发送一些数据,但它不起作用,“ReceiverCsh”没有收到任何消息。
所以:
- SenderCpp->ReceiverCpp:有效
- SenderCsh->ReceiverCsh:有效
- SenderCpp->ReceiverCsh:不工作
SenderCpp 代码是:
void SendCopyData(HWND hFind)
{
COPYDATASTRUCT cp;
StackRecord record;
record.CursorX = 1;
record.CursorY = -1;
_tcscpy(record.cmdline, L"Hello World!");
cp.cbData = sizeof(record);
cp.lpData = &record;
cp.dwData = 12;
SendMessage(hFind, WM_COPYDATA, NULL, (LPARAM)&cp);
}
void CCANDriverDlg::OnBnClickedButton2()
{
HWND hWnd = ::FindWindow(NULL, CString("ReceiverCpp"));
SendCopyData(hWnd);
}
void CCANDriverDlg::OnBnClickedButton1()
{
HWND hWnd = ::FindWindow(NULL, CString("ReceiverCsh"));
SendCopyData(hWnd);
}
ReceiverCsh 是:
protected override void WndProc(ref Message m)
{
switch(m.Msg)
{
case WM_COPYDATA:
// Win32.CopyDataStruct st = (Win32.CopyDataStruct)Marshal.PtrToStructure(m.LParam, typeof(Win32.CopyDataStruct));
CopyDataStruct st = (CopyDataStruct)Marshal.PtrToStructure(m.LParam, typeof(CopyDataStruct));
//txtmessagereceive.Text = strData;
CANMessage MsgIn = new CANMessage(8);
MsgIn = (CANMessage)Marshal.PtrToStructure(st.lpData, typeof(CANMessage));
// Decode the marshaled message
txtmessagereceive.Text = "dwData = " + st.dwData.ToString() +"\r\n" +
"cbData = " + st.cbData + " bytes\r\n" +
"CANID = " + MsgIn.CANID.ToString() + "\r\n";
for (int i=0; i<8; i++)
{
txtmessagereceive.Text += String.Format("Data[{0}]={1}\r\n", i, MsgIn.Data[i]);
}
break;
default:
// let the base class deal with it
base.WndProc(ref m);
break;
}
}
使用 Spy++ 我看到监视“ReceiverCsh”时,当 SenderCpp 发送 WM_COPYDATA 时没有显示消息,而是在分析 ReceiverCpp 时显示消息。
你有什么想法吗?谢谢。