If Trim(txtheight.Text) = "" Then txtheight.Text = 0
rad = txtrad.Text
rad2 = rad * rad
rad3 = rad * rad * rad
high = txtheight.Text
third = 1 / 3
pi = 3.14159265
ft = 4 / 3
    If IsNumeric(rad) Then
        If IsNumeric(high) Then
            'If oppyrvol.Value = True Then
            '    Sum = rad * high * third
            '    lblansvol.Caption = Sum
            'ElseIf oppyrarea.Value = True Then
            '    MsgBox "This Command hasnt ben finished yet."
            'ElseIf oppyrcirc.Value = True Then
            '    MsgBox "This Command is useless. it CANT be done. The radio button is just for show."
            'ElseIf opspherevol.Value = True Then
            '    Sum = ft * pi * rad3
            '    lblansvol.Caption = Sum
            'ElseIf opspherearea.Value = True Then
            '    Sum = 4 * pi * rad2
            '    lblansarea.Caption = Sum
            'ElseIf opspherecirc.Value = True Then
            '    Sum = pi * rad2
            '    lblanscirc.Caption = Sum
            'ElseIf opcylvol.Value = True Then
            '    Sum = pi * rad2 * high
            '    lblansvol = Sum
            'ElseIf opcylarea.Value = True Then
            '    Sum = (2 * pi * rad2) + (2 * pi * high)
            '    lblansarea.Caption = Sum
            'ElseIf opcylcirc.Value = True Then
            '    MsgBox "This Command is useless. it CANT be done. The radio button is just for show."
            'Else: MsgBox "Please check a button."
            'End If
            Select Case lblans
                Case "pyrvol": oppyrvol.Value = True
                    Sum = rad * high * third
                    lblans.Caption = Sum
            End Select
        Else: MsgBox "The Input must be of numeric value!"
    End If
End If
End Sub