Puri,

I'm not sure exactly what behavior you want here. The KeyPress fires when the key is released not when it is pressed. You could use a timer to time out teh form and in the keypress;

IF nKeyCode = 32
   Thisform.Timer.Enabled = NOT Thisform.Timer.Enabled
ENDIF

That would cause the spacebar to toggle the timer on and off. I don't how to tie the timer to the pressed state of a key though. You would probably need to write an FLL to read the keyboard state from teh OS.