I have the classic alt tab menu enabled (HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer AltTabSettings set to 1) but have found the AltTab feature doesn't show the menu. It just acts as though I pressed alt+esc.
The above code should show the alt+tab menu when pressing ctrl+t. It doesn't when the classic alt tab menu is enabled and just switches to the last window. I have also tried AltTab and Send, {Alt down}{tab} to no avail.