Automatic place char. into keyboard buffer?

Hi Stevie G and Jams,

The virtual key is needed because I DON'T want
to manually input data into the keyboard buffer.
I don't type 'S' and 'X'. Let Blitz3D do it for me.

The function is useful when you run a auto-play demo.
eg. when you enter old doom game and leave it there,
after a while, it will play automatically.

Thanks
Sammy
:)