FilePrint not working in Office 2013

Question

Hi,
we are trying to override the idmso FilePrint command in the ribbon. This works fine in Word/Excel/PPT 2007 and 2010 but not in 2013.
Is there any bug in 2013 or did the command name change? Strangely office doesn't throw any errors but the function doesn't get called when I go to File -> Print and click the print button.
<customUI xmlns="http://schemas.microsoft.com/office/2009/07/customui" onLoad="Ribbon_Load">
<commands>
<command idMso="FilePrint" onAction="OnFilePrint"/>
</commands>
public void OnFilePrint(IRibbonControl control, ref bool CancelDefault)
MessageBox.Show("Hello World");
Any ideas?
Thank you very much.
Best regards
Mark
Regards Mark

Answer 1

Hello Mark,
I suppose you are talking about the Print command shown on the screenshot:
The fact is that you are trying to repurpose the backstage controls.
It is not possible to override these commands from the custom UI XML markup or by using the object model.
A better solution would be to consider hiding the built-in UI and rebuilding it fully with custom commands.
See
Introduction to the Office 2010 Backstage View for Developers and
Customizing the Office 2010 Backstage View for Developers for more information.