Use the Transform method in VC++

Code:
void CYourApplicationDlg::OnMouseMoveMap(short Button, short Shift, long X, long Y) 
{

// Here, we'll demonstrate the Transform  method whilst tracking the mouse 
// coordinates in the debug window.  We're assuming that our 
// mapcontrol has already been set to project to UTM Grid Zone 33N.

CMoPoint aPoint(m_map.ToMapPoint((float)X, (float)Y));
TRACE2( "Projected mouse position %f\t%f\n", aPoint.GetX(), aPoint.GetY() ); 
 
// define a Projected Coordinate System or just get it from the mapcontrol!
CMoProjCoordSys aProjCoordSys;
aProjCoordSys.CreateDispatch(TEXT("MapObjects2.ProjCoordSys"));
aProjCoordSys.SetType(moProjCS_WGS1984UTM_33N);
 
// define a geographic coordsys
CMoGeoCoordSys aGeogCoordSys;
aGeogCoordSys.CreateDispatch(TEXT("MapObjects2.GeoCoordSys"));
aGeogCoordSys.SetType(moGeoCS_WGS1984);
 
// create VARIANTs to be used for the transform method Note. If you did want 
// to use the geotrans, the Variant should be set up to accept dispatch pointers:
// e.g. va.vt = VT_DISPATCH; and then va.pdispVal = myGeotrans.m_lpDispatch;
VARIANT va; // for the geotransformation object
VariantInit(&va);
va.vt = VT_NULL;
 
VARIANT vax; 
// for the densification tolerance - this should be passing a double
VariantInit(&vax);
vax.vt = VT_R8;
vax.dblVal = 0.0; 
 
// Now transform the point
CMoPoint aGeogPoint(aGeogCoordSys.Transform(aProjCoordSys.m_lpDispatch, aPoint.m_lpDispatch, vax, va));
TRACE2( "Geographic mouse position %f\t%f\n", aGeogPoint.GetX(), aGeogPoint.GetY() ); 
// and do some rubbish collection to recover memory
aProjCoordSys.ReleaseDispatch();
aGeogCoordSys.ReleaseDispatch();