You could try the on screen keyboard located on the desktop computer in the
Start - Programs - Accessories - Accessibility menu.
I just tried it out, using Terminal Services Client, and it seems to work
while running a Dos command window.
If your device supports a USB keyboard, then that might work. My Toshiba
e800 supports a USB keyboard if I buy a $20 cable.
My Pocket PC keyboard that I do have for my ViewSonic device doesn't have
Function keys or an Alt key, though it does have a Windows key.