FW: GDK_WINDOW_XID and XGetInputFocus give me different results

["zielone" <zielone0 poczta onet pl>]

Hi All

I notice strange behaviour of this function 

when i try to get window id this method:
GtkWidget* widget = (GtkWidget*)wxSomeWxWindow->GetHandle();
Window myid = GDK_WINDOW_XID(widget->window)

I receive always id decrease by 1 in comparing to id received by
function:
XGetInputFocus(display, &focus, &revert_to);

For example i have such results after converse to int:
39846108 for first method
39846109 for second method 

I would like to have id of my window  and do some action only when focus
is not in my window
If(myid!=focus) //i dont have focus
{
        do something
}
But in this case even if i have focus i still do something because of
this difference
Can someone explain me this??

Michael