Android Question how do i check if a value does not start with zero

[Makumbi]

    Please help how can i check a text value such that if it doesnot start with a zero then a message box is displayed thanks
    If Not Phone.Text.StartsWith("0") Then

 

[LucaMs]

If Not(Phone.Text.StartsWith("0")) Then

 

[emexes]

I think the question is really: how to display the message box?

A toast message generated by the .TextChanged event would probably do the job.