How to control KeyPress method of TextBox in Excel VBA

I have a code that will create TextBoxes inside a Multipage:

Private Sub CommandButton1_Click()

RowChar = 70
MultiPage1.Pages.Clear

For i = 0 To TextBox1.Value - 1
    MultiPage1.Pages.Add
    MultiPage1.Pages(i).Caption = "Variable"& i + 1

    Call LabelPerPage

    Set txtbx = UserForm1.MultiPage1.Pages(i).Controls.Add("Forms.TextBox.1", "NameBox")
    With txtbx
        .Top = 20
        .Left = 100
    End With

    Set txtbx = UserForm1.MultiPage1.Pages(i).Controls.Add("Forms.TextBox.1", "MinBox")
    With txtbx
        .Top = 50
        .Left = 100
    End With


    Set txtbx = UserForm1.MultiPage1.Pages(i).Controls.Add("Forms.TextBox.1", "LsbBox")
    With txtbx
        .Top = 20
        .Left = 300
    End With

    Set txtbx = UserForm1.MultiPage1.Pages(i).Controls.Add("Forms.TextBox.1", "MaxBox")
    With txtbx
        .Top = 50
        .Left = 300
    End With

    If i = 0 Then
        FormulaString = "= C15"
    Else
        FormulaString = FormulaString & ""& Chr(RowChar) & "15"
        RowChar = RowChar + 3
    End If
Next i
TextBox2.Value = FormulaString
End Sub

Private Sub LabelPerPage()
    Set txtbx = UserForm1.MultiPage1.Pages(i).Controls.Add("Forms.Label.1")
    With txtbx
        .Top = 20
        .Left = 50
        .Caption = "NAME:"
    End With

    Set txtbx = UserForm1.MultiPage1.Pages(i).Controls.Add("Forms.Label.1")
    With txtbx
        .Top = 50
        .Left = 50
        .Caption = "MIN:"
    End With

    Set txtbx = UserForm1.MultiPage1.Pages(i).Controls.Add("Forms.Label.1")
    With txtbx
        .Top = 20
        .Left = 250
        .Caption = "LSB:"
    End With

    Set txtbx = UserForm1.MultiPage1.Pages(i).Controls.Add("Forms.Label.1")
    With txtbx
        .Top = 50
        .Left = 250
        .Caption = "MAX:"
    End With
End Sub

I tried to create a code that will create a page and also textbox in it, my problem is I cannot do KeyPress on a TextBox because it will only automaticaly create because of my code.

Goal:

1.) My target is to do KeyPress were the TextBox cannot input a numberic value or Letter.

2.) I want to compare the 2 textbox were textbox1 should be minimum to textbox2

**I hope someone can help me because I tried my best to solve it. I tried doing this to the code:

Option 1:

Private Sub MaxBox_KeyPress(ByVal KeyAscii As MSForms.ReturnInteger)
If (KeyAscii > 46 And KeyAscii < 58) Or KeyAscii = 43 Then
KeyAscii = KeyAscii
Else
KeyAscii = 0
MsgBox "Invalid key pressed, you can enter numbers only"
End If
End Sub

Option 2:

Private Sub OnlyNumbers()
    If TypeName(Me.ActiveControl) = "MaxBox" Then
        With Me.ActiveControl
            If Not IsNumeric(.Value) And .Value <> vbNullString Then
                MsgBox "Sorry, only numbers allowed"
                .Value = vbNullString
            End If
        End With
    End If
End Sub

But it won't work. Thank you in advance if someone can help :)