Urgent F10 key_press possible bug

Hello,
       i think i have find a bug in the gdk_event_translate(...) 
under Win32. The problem is that i can't catch F10 in the my 
key_press_event callback func. The F10 in win32 is a 
WM_SYSKEYUP/WM_SYSKEYDOWN message and i have noted in 
gdk_event_translate(..) the seguent code:

    case WM_SYSKEYUP:
    case WM_SYSKEYDOWN:
      ......
      /* If posted without us having keyboard focus, ignore */
      if (!(msg->lParam & 0x20000000))
	break;
      .....
In the win32 documentation the bit 29 of lParam:
Specifies the context code. The value is 1 if the ALT key is down 
while the key is pressed; it is 0 if the WM_SYSKEYDOWN message is 
posted to the active window because no window has the keyboard focus.
But i have noticed that if my window has keyboard focus when i press 
F10 without ALT the bit 29 is alwais 0; it become 1 only if i press 
ALT+F10. In my opinion the solution is to remove the "if".
If i think good can someone make the correction (i don't known what 
to do) ? If i am in error what is the real solutions ?

Thanks

        dr hammer