Sets a boolean value that specifies whether the control is visible or hidden.

Sample Ribbon XML file:

<customUI xmlns="" onLoad="CallbackOnLoad">
      <ribbon startFromScratch="false">
            <tab id="Toogle Button Demo" label="Toogle Button Demo">
                <group id="MyGroup" label="Toogle Button Demo">
                    <button id="MyButton" label="I ;-)"
                      size="large" getVisible="CallbackGetVisible"/> 
                    <toggleButton id="MyToggleButton1" size="large" 
                      label="Toggle Button (An/Aus)" imageMso="HappyFace"

Function to be copied to a standard module:

Option Compare Database
Option Explicit
Public bolVisible As Boolean
Sub CallbackGetVisible(control As IRibbonControl, _
                       ByRef visible)
' Callback Visible
    visible = bolVisible
End Sub


You can find this sample in Sample DB 2