Help with TAPI callback function

Hello,
 
 I have read quite a bit of very useful information on this on other forums,
and
 I believe I am very close to having my TAPI application in working order.
 What I cannot seem to get to work, is the callback function to get notified of
 incoming calls, etc. I have seen a number of similar requests on this forum,
 but do far none os the replies managed to solve my particular problem.
 
 I am writing a console app, so no MFC, in Visual C++ 6.0 on Windows XP. I
have
 a working voice modem, and have managed to get everything I need working using
 TB20...so I know the elements are all succssfully in place. I am using
TAPI2.2.
 
 TAPI initializes fine, and the line is opened successfully, but my callback
 function never seems to get called.
 
 I gather it is something to do with my message loop, but I am not sufficiently
 familiar with this in a console app to know if I am missing something.
 
 Any offered help would be GREATLY appreciated!!
 
 My main routine, looks like this:
 int main(int argc, char* argv[])
 {
 LONG returnCode;
 BOOL bReturnCode;
 MSG msg;
 
 // Prime the message queue.
 PeekMessage( &msg, NULL, 0, 0, PM_REMOVE );
 
 if( (returnCode = InitializeTAPI()) != 0 )
 return 1;
 
 if( (returnCode = TAPILineOpen( 1 )) != 0 )
 return 1;
 
 // Get hidden window messages from TAPI, and dispatch them.
 while( (bReturnCode = GetMessage( &msg, NULL, 0, 0 )) != 0 )
 {
 if( bReturnCode == -1 )
 {
 // handle the error and possibly exit
 }
 else
 {
 TranslateMessage( &msg );
 DispatchMessage( &msg );
 }
 }
 
 TAPILineClose();
 DestroyTAPI();
 
 return 0;
 }
 
 To initialize TAPI, I use the following:
 LONG InitializeTAPI()
 {
 LONG returnCode;
 DWORD apiVersion = TAPI_CURRENT_VERSION;
 LINEINITIALIZEEXPARAMS lineInitializeExParams = {0};
 
 // If we already have a lineApp, then initialization has already succeeded.
 if( hLineApp )
 return TRUE;
 
 // Setup the initialization parameters.
 lineInitializeExParams.dwTotalSize = sizeof( LINEINITIALIZEEXPARAMS );
 lineInitializeExParams.dwOptions = LINEINITIALIZEEXOPTION_USEHIDDENWINDOW;
 
 returnCode = lineInitializeEx(
 &hLineApp,
 hInst,
 (LINECALLBACK) lineCallbackFunc,
 (LPCSTR)"FAMOS",
 (LPDWORD)&dwNumDevs,
 (LPDWORD)&apiVersion,
 (LPLINEINITIALIZEEXPARAMS)&lineInitializeExParams
 );
 
 return returnCode;
 }
 
 And then I open the specific line to my modem (yes I have verified
 I have the correct line number):
 LONG TAPILineOpen( DWORD lineNumber)
 {
 LONG returnCode;
 DWORD apiVersion = TAPI_CURRENT_VERSION;
 LINECALLPARAMS lineCallParams = {0};
 LINEEXTENSIONID lineExtensionID;
 
 // If we already have an open line, then we have previously succeeded.
 if( hLine )
 return TRUE;
 
 returnCode = lineNegotiateAPIVersion(
 hLineApp,
 lineNumber,
 apiVersion, // Lowest version we support
 apiVersion, // Highest version we support
 &apiVersion, // TAPI will put the agreed-upon version in here
 &lineExtensionID // If the specified line has extensions, the details
 ); // get placed in here.
 if( returnCode != 0 )
 return( -1 );
 
 // Setup the line call parameters.
 lineCallParams.dwTotalSize = sizeof( LINECALLPARAMS );
 
 returnCode = lineOpen(
 hLineApp,
 lineNumber,
 &hLine,
 apiVersion,
 0, // Extenstion version
 0, // Callback data
 LINECALLPRIVILEGE_OWNER || LINECALLPRIVILEGE_MONITOR,
 LINEMEDIAMODE_AUTOMATEDVOICE || LINEMEDIAMODE_INTERACTIVEVOICE,
 (LPLINECALLPARAMS)&lineCallParams
 );
 printf( "Line openedn" );
 
 return returnCode;
 }
 
 Finally, my callback function is:
 void CALLBACK lineCallbackFunc(
 DWORD dwDevice, DWORD dwMsg, DWORD dwCallbackInstance,
 DWORD dwParam1, DWORD dwParam2, DWORD dwParam3 )
 {
 ULONG deviceID;
 
 printf( "Callback enteredn" );
 }
 
 Thanks to any/all who to take the time to respond!
 
 Regards,
 Julian