Using a Do...Loop While structure, write the code that repeatedly prompts

I have to do this
Using a Do...Loop While structure, write the code that repeatedly prompts the user using an InputBox for a number, and continues to prompt the user until a valid positive number is entered.

Would someone check my answer? I can't figure why this is not working properly? I don't even know if I am doing what this question is asking me to do?! I just started Visual Basic 3 weeks ago

Public Class Form1

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim stringMagic As String
Do
stringMagic = InputBox("Enter my age", "Guess")
Loop While stringMagic = "51"
End Sub
End Class

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Also, is this http://www.excelforum.com/excel-prog...th-number.html

1Melina, please read Forum rules or I'll start to give infractions.
You have few threads closed because of duplicate posting and that's nobody interest.

Welcome to the Forum, unfortunately:

This is a duplicate post and as such does not comply with Rule 5 of our forum rules. This thread will now be closed, you may continue in your other thread.
http://www.excelforum.com/excel-prog...y-prompts.html

Thread Closed.