How do you develop a program in Visual Basic.NET that validates the value a user enters into a textbox control

to ensure that the entry is a valid phone number. 12 maximum of characters. And should be in a form of 999-999-9999. A message box should display whether or not the entry is a phone number. Indexof, IsNumeric, substring, and focus?How do you develop a program in Visual Basic.NET that validates the value a user enters into a textbox control
Well I can't tell u how to do it b/c that would be wrong. But yes. You have to use IndexOf, IsNumeric, substring, and focus. So yes u are the right track. Contact me at free_best_jack@yahoo.com if you have any more questions.How do you develop a program in Visual Basic.NET that validates the value a user enters into a textbox control
by numerating
if i do know the as.i would surely help u ..bbyyee friend nd sorry
first of all just take the length of that S=string(the value the user inputs in the inputbox)and if S.length=9 and IsNumeric(S) the user gave a phone number.is that ok?
WE HAVE TO IMPROVE IN SCINCE VERY LOT

Scooter