Hi "G.R. Toro",
I don't think you can access
an equation editor object programmatically,
because, as far as I know, it is a stripped off version
of a third party product (MathType).
Things may be different if you buy a full version.
If your equation is a shape, then
Dim oShp As Shape
For Each oShp In ActiveDocument.Shapes
If oShp.OLEFormat.ClassType = "Equation.3" Then
' oshp.Height = whatever
End If
Next

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Greetings from Bavaria, Germany
Helmut Weber, MVP WordVBA
Win XP, Office 2003
"red.sys" & Chr$(64) & "t-online.de"