Test whether my MDI app has the focus?

I did a search but could not find this, though I'm sure it's been answered before.

I need to be able to test whether my MDI app has the focus or not.

What's the best way to do this?

The following should work:

Code:

---

if(CWnd::GetFocus()->GetSafeHwnd() == AfxGetMainWnd()->GetSafeHwnd())
{
  // Our App's main window has focus
}

---

doesn't.

What exactly is not working? Did you look at the values returned by GetFocus()->GetSafeHwnd() and AfxGetMainWnd()->GetSafeHwnd() and looked them up in Spy++? Could it be that a child window (and not the main window) actually has the focus when you are testing?