Increase and decrease shape text margins with limit

Hello everyone. First of all thanks for the support. You are great!

I know I'm probably making a really dumb mistake in my code but I can't make it out.

There are three Subs: 1) increase the margin up to a size of 1,5cm; 2) decrease; and 3) reset margins to 0.

The increase works but ignores de the 1,5 cm limiter. Same happens with the decrease which ignores the 0 limit. The reset works fine.

Thanks in advance for your help!

Code:

---

Option Explicit
Const MarginMax = 28.35 * 1#
Const MarginIncrement = 28.35 * 0.05


Sub marginincrease()
Dim oshp As Shape
For Each oshp In ActiveWindow.Selection.ShapeRange
If oshp.HasTextFrame Then
With oshp.TextFrame
    If .MarginBottom >= 0 Or .MarginBottom <= MarginMax Then .MarginBottom = .MarginBottom + MarginIncrement
    If .MarginLeft >= 0 Or .MarginLeft <= MarginMax Then .MarginLeft = .MarginLeft + MarginIncrement
    If .MarginTop >= 0 Or .MarginTop <= MarginMax Then .MarginTop = .MarginTop + MarginIncrement
    If .MarginRight >= 0 Or .MarginRight <= MarginMax Then .MarginRight = .MarginRight + MarginIncrement
End With
End If
Next
End Sub


Sub margindecrease()
Dim oshp As Shape
For Each oshp In ActiveWindow.Selection.ShapeRange
If oshp.HasTextFrame Then
With oshp.TextFrame
    If .MarginBottom >= 0 Or .MarginBottom <= MarginMax Then .MarginBottom = .MarginBottom - MarginIncrement
    If .MarginLeft >= 0 Or .MarginLeft <= MarginMax Then .MarginLeft = .MarginLeft - MarginIncrement
    If .MarginTop >= 0 Or .MarginTop <= MarginMax Then .MarginTop = .MarginTop - MarginIncrement
    If .MarginRight >= 0 Or .MarginRight <= MarginMax Then .MarginRight = .MarginRight - MarginIncrement
End With
End If
Next
End Sub


Sub noMargins()
Dim oshp As Shape
For Each oshp In ActiveWindow.Selection.ShapeRange
If oshp.HasTextFrame Then
With oshp.TextFrame
    .MarginBottom = 0
    .MarginLeft = 0
    .MarginTop = 0
    .MarginRight = 0
End With
End If
Next
End Sub

---

I was right is was a dumb mistake. Here is the updated code.

Code:

---

Option Explicit
Const MarginMax = 28.35 * 1.5
Const MarginIncrement = 28.35 * 0.05


Sub MarginIncrease()
Dim oShape As Shape


For Each oShape In ActiveWindow.Selection.ShapeRange
    If oShape.HasTextFrame Then
    With oShape.TextFrame
        If (.MarginBottom + MarginIncrement) <= MarginMax Then .MarginBottom = (.MarginBottom + MarginIncrement)
        If (.MarginLeft + MarginIncrement) <= MarginMax Then .MarginLeft = (.MarginLeft + MarginIncrement)
        If (.MarginTop + MarginIncrement) <= MarginMax Then .MarginTop = (.MarginTop + MarginIncrement)
        If (.MarginRight + MarginIncrement) <= MarginMax Then .MarginRight = (.MarginRight + MarginIncrement)
    End With
    End If
    Next
End Sub


Sub MarginDecrease()
Dim oshp As Shape
For Each oshp In ActiveWindow.Selection.ShapeRange
If oshp.HasTextFrame Then
With oshp.TextFrame
    If (.MarginBottom - MarginIncrement) >= 0 Then .MarginBottom = (.MarginBottom - MarginIncrement)
    If (.MarginLeft - MarginIncrement) >= 0 Then .MarginLeft = (.MarginLeft - MarginIncrement)
    If (.MarginTop - MarginIncrement) >= 0 Then .MarginTop = (.MarginTop - MarginIncrement)
    If (.MarginRight - MarginIncrement) >= 0 Then .MarginRight = (.MarginRight - MarginIncrement)
End With
End If
Next
End Sub


Sub MarginNone()
Dim oshp As Shape
For Each oshp In ActiveWindow.Selection.ShapeRange
If oshp.HasTextFrame Then
With oshp.TextFrame
    .MarginBottom = 0
    .MarginLeft = 0
    .MarginTop = 0
    .MarginRight = 0
End With
End If
Next
End Sub

---

I came across to unforeseen cases. if the shape is a table, nothing happens. Am I correct in supposing I have to loop through all cells?

The other case, which applies to both regular shapes and tables is in dealing with the title line.

Shape Table

_________
| Shape 1 |
------------
| Shape 2 |
| |
-------------

Shape one should not modify, Shape 2 Should. If more than one shape group is selected then each should be processed in the same way.

Please help!
Thanks in advance