var ctrl = m_Map.GetCtrlMan();
var ctrlstate = ctrl.GetControlState();

var zoom = ctrlstate.GetZoom();
alert(zoom);

#include "CXCtrlMan.h"
#include "CXControlState.h"

CXCtrlMan ctrlman = m_Map.GetCtrlMan();
CXControlState ctrlstate = ctrlman.GetControlState();

double dZoom = ctrlstate.GetZoom();
CString str;
str.Format(_T("Current Zoom : %f"), dZoom);
AfxMessageBox(str);