Unable to intercept Commands in Word

[M Fitzmaurice]

Hi All

I'm having trouble intercepting commands in Microsoft Word and would appreciate help. (The Checkin Checkout commands are for use with SharePoint)

I put the following XML into either a VSTO or VBA addin:

<?xml version="1.0" encoding="UTF-8"?>
<customUI xmlns="http://schemas.microsoft.com/office/2009/07/customui" onLoad="Ribbon_Load">
<commands>
<command idMso="FileNewDefault" onAction="FileNew_Click"/>
<command idMso="FileCheckIn" onAction="FileCheckIn_Click"/>
<command idMso="FileCheckOut" onAction="FileCheckOut_Click"/>
<command idMso="FileCheckOutDiscard" onAction="FileCheckOutDiscard_Click"/>
<command idMso="LeaveReader" onAction="LeaveReader_Click"/>
</commands>
</customUI>

Some commands work:
- FileNewDefault
- FileCheckOut

But the following do not work:
- FileCheckIn
- FileCheckOutDiscard
- LeaveReader (I understand that this command should intercept pressing 'Edit Document')

Why don't those commands work?
Do they have different method signatures to the commands that work?
Where is the documentation?
Have Microsoft neglected to finish these methods?

Any help would be greatly appreciated
Matt