SET NOTIFY OFF takes care of both problems. Thanks! (The delay was presumably being caused by the time it takes to display 'Invalid Input')

>SET NOTIFY OFF will get rid of the message
>
>CLEAR TYPEHEAD will clear out the keyboard buffer and may get rid of the delay.
>
>>Hi All:
>>
>>Consider please the followng code:
>>
>>

>>CLEAR
>>
>>lctest = ' ' 
>>
>>@ 2,2 get lctest valid tt(lctest)
>>READ
>>
>>RETURN
>>
>>
>>FUNCTION tt(bb)
>>
>>IF bb = 'v'
>>	RETURN .t.
>>ELSE
>>	RETURN .f.
>>ENDIF
>>

>>
>>if the user presses 'x' 10 times, a wait-type window appears saying 'Invalid Input' and there is a delay until VFP processes the buffer to respond to a valid input (v).
>>
>>How can I:
>>1. Suppress the 'Invalid Input' message
>>2. Get rid of the delay
>>
>>Thanks,
>>
>>Yossi
>>
>>PS This is for a Clipper conversion project, so it is impractical to just replace all the @ commands with a VFP form.