Capturing Raw Input Messages

[TonyG-614]

I'm trying to capture messages from the keyboard in my CVI application regardless of where the user touched the screen.  I found an article on using the raw input API to do this.  I made the call to RegisterRawInputDevices to tell Windows to send raw input to my CVI program.  That seemed to work correctly.  Then I called InstallWinMsgCallback to setup my callback function for WM_INPUT messages.  When the program runs I hit keys on the keyboard but my callback never gets called.  I'm not sure if the issue is with the way I'm registering the raw input or with the way I setup the WM_INPUT callback.  Code snippets are below.  Any suggestions on how to figure out what's going wrong would be appreciated.

In main:

WindowsHandle = GetCVIWindowHandle();

RAWINPUTDEVICE RawInputDevice[1];
RawInputDevice[0].dwFlags = RIDEV_NOLEGACY|RIDEV_INPUTSINK;
RawInputDevice[0].usUsagePage = 0x01;
RawInputDevice[0].usUsage = 0x06;
RawInputDevice[0].hwndTarget = WindowsHandle;
if (RegisterRawInputDevices(RawInputDevice, 1, sizeof(RawInputDevice[0])) == FALSE)
{
    MessagePopup("Crap!", "Didn't register");
    Error = GetLastError();
} /* if-then */
else
{
    MessagePopup("Yes!", "Success");
} /* if-else */

intptr_t TempHandle;
if ((stat = InstallWinMsgCallback (panelHandle, WM_INPUT, MainPnlMsgCallback, VAL_MODE_IN_QUEUE, NULL, &TempHandle)))
{
    MessagePopup ("Error", GetGeneralErrorString (stat));
}

My callback:

int CVICALLBACK MainPnlMsgCallback (int panelHandle,
                                    int message,
                                    unsigned int* wParam,
                                    unsigned int* lParam,
                                    void* callbackData)
{
    /* Pay attention if our Windows handle was changed... */
    if (message == EVENT_NEWHANDLE)
    {
        MessagePopup ("","New handle!!!");
    }
    else
    {
        char Buff[100];
        sprintf(Buff,"msg=%d", message);
    }
    return 0;
}