Question

我有一个Visual Basic应用程序（.NET），我已经设置了所有注册消息并发送它们的声明：

    Private Const WM_DELETE_EVENT_STRING As String = "WM_xxx_DELETE_EVENT"
    Private Const WM_INSERT_EVENT_STRING As String = "WM_xxx_INSERT_EVENT"

    Private Shared WM_DELETE_EVENT As UInteger = Posting.PostingFunctions.RegisterWindowMessage(WM_DELETE_EVENT_STRING)
    Private Shared WM_INSERT_EVENT As UInteger = Posting.PostingFunctions.RegisterWindowMessage(WM_INSERT_EVENT_STRING)

    <DllImport("user32.dll", SetLastError:=True, CharSet:=CharSet.Auto)> _
    Private Shared Function SendMessage(ByVal hWnd As IntPtr, ByVal Msg As UInteger, ByVal wParam As IntPtr, ByVal lParam As IntPtr) As IntPtr
    End Function

    <DllImport("user32.dll", CharSet:=CharSet.Auto)> _
    Private Shared Function RegisterWindowMessage(ByVal lpString As String) As UInteger
    End Function

    <DllImport("user32.dll", SetLastError:=True, CharSet:=CharSet.Auto)> _
    Private Shared Function FindWindow(ByVal lpClassName As String, ByVal lpWindowName As String) As IntPtr
    End Function

我发布的句柄是IntPtr类型。我通过使用：

从调用过程中提供它

    strNumber.Format(_T("%d"), theApp.GetMainWnd()->GetSafeHwnd());
    WritePrivateProfileString(_T("Settings"), _T("HwndExternalApp"), strNumber, strINI);

我所做的是在VB进程中从INI文件中读取它：

    m_hExternalApp = CLng((oIni.IniReadValueInt("Settings", "HwndExternalApp"))

我的调用过程是MDI应用程序。我将相同的两条注册消息添加到CMainFrame类。

最后，这是我调用VB进程的方式：

    <snipped out CreateProcess code>
    DWORD WaitResult;
    do
    {
        WaitResult = MsgWaitForMultipleObjects(1,
            // only 1 wait object
            &processInformation.hProcess, // worker thread
            FALSE,   // stop if any
            INFINITE,  // no timeout
            QS_ALLINPUT);
        if (WaitResult == WAIT_OBJECT_0 + 1)
        {
            // Handle windows message
            MSG Msg;
            while (PeekMessage(&Msg, NULL, 0, 0, PM_REMOVE))
            {
                TranslateMessage(&Msg);
                DispatchMessage(&Msg);
            }
        }
    } while (WaitResult == WAIT_OBJECT_0 + 1);
    ASSERT(WaitResult == WAIT_OBJECT_0);

我确认VB处理程序实际上被解雇了，但是C ++应用程序似乎并没有处理它们。所以：

我是否将正确的句柄传递给我的INI文件以供VB进程使用？
我正确使用MsgWaitForMultipleObjects吗？

我在这里深水，不知道我哪里出错了。

感谢您的帮助。

安德鲁

为什么我的注册消息没有被触发（跨进程）

0 个答案: