>>I would create a custom class of the textbox. Then add an Assign method to the Value property with the following:
>>
>>

>>LPARAMETERS txValue
>>this.ForeColor = RGB(0,0,0)
>>IF VARTYPE(txValue) = "N"
>>  IF txValue >= 0.00
>>    this.Value = txValue
>>  ELSE
>>    this.Value = "(" + ABS(txValue) + ")"
>>    this.ForeColor = RGB(255,0,0)
>>  ENDIF
>>ELSE
>>  this.Value = txValue
>>ENDIF
>>

>
>If the user changed her mind and decided to make the number positive, how would the forecolor change back?
>
>That forecolor might stay red if the user

Did you read the code carefully? (Hint: see line # 2)