HELP!! How to prevent Input of Alphabets in the code below >>>

[Rush1991]

Thanks Guys Problem Solved For That Part

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POST EDITED BY HanneSThEGreaT to reflect original question
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Do
StudentDetails(X).English = InputBox("Please Enter English Marks")
If StudentDetails(X).English < 0 Or StudentDetails(X).English > 100 Then
MessageBox.Show("Invalid input!""Please enter a value not More then 100 or Less then 0!", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
End If
Loop While (StudentDetails(X).English < 0 Or StudentDetails(X).English > 100)

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