I think you have to write code in the Valid event of the textbox. You could always create a class to do it for you. Example with dates:

DEFINE CLASS txtValidateDates
dLowDate={}
dHighDate={}

FUNC Valid
LOCAL lValid
lValid=.T.
WITH this
DO CASE
CASE !EMPTY(.dLowDate) .AND. !EMPTY(.dHighDate)
IF .value<.dLowDate{} .OR. .value>.dHighDate
lValid=.F.
ENDIF
CASE !EMPTY(.dHighDate)
IF .value>.dHighDate
lValid=.F.
ENDIF
CASE !EMPTY(.dLowDate)
IF .value<.dLowDate
lValid=.F.
ENDIF
ENDCASE
RETURN lValid
ENDFUNC
ENDDEFINE

Or something to this effect.

Of course, you'd want to put the class in a VCX so you could then drop in on a form and then put values in dLowDate and dHighDate at design time.

>I need to specify a range for a few fields on a form. Is there an equivalent to the RANGE option of the @GET from the 2.x days in VFP? I found the RangeHigh and RangeLow events but these say they only deal with numerics where the RANGE option dealt with alpha, numerics and dates. Any suggestions?