>Could someone give me some sample code that would go
>in a RangeLow event and/or RangeHigh event?

*Rangelow
return iif(thisform.custType.value = "Premium",1000,10)
*Rangehigh
return iif(thisform.custType.value = "Premium",100000,999)

In short you could put there any code that would return a numeric value. As help says it's fired after lostfocus and control doesn't lose focus if returned value smaller (Rlow) or greater (Rhigh). If entered value doesn't obey the returned value an appropriate message displayed. To replace that message with yours, set notify off and use "wait win" or "messagebox()" in your code.
Help says for combos and lists it's evaluated when control receives focus and item with ret value is initially selected (I couldn't get this into work and don't use - didn't understand the necessity either).
Cetin