Making VBA Form TextBox accept Numbers only (including +, - and .)

Question

I have simple textBox and I want to validate its input including \"+\" , \"-\" and \".\" here is what I have tried

Private Sub DisplayValue_TextBox_Change()         


        

Answer 1

If TextBox1.Value <> "" Then
    Dim N As Boolean
    N = True
    Do While N
        If Not IsNumeric(TextBox1.Value) Then
            TextBox1.Value = Left(TextBox1.Value, Len(TextBox1.Value) - 1)
        Else
            N = False
        End If
    Loop
End If