I am working on Otlook 2010 add-in and currently customizing Ribbon UI. So far so good, but I have one problem with customizing context menu for embedded objects in mails. I have tried many idMso context menus, but none of them is working.
Do anyone have experience which idMso is context menu shown below or how to add new button there?
Sample of my custom-ribbon.xml:
<?xml version="1.0" encoding="utf-8"?>
<customUI onLoad="OnRibbonLoad" xmlns="http://schemas.microsoft.com/office/2009/07/customui">
<contextMenus>
<contextMenu idMso="ContextMenuText">
<button id="MyContextMenuText"
imageMso="HappyFace"
label="ContextMenuAttachments"
onAction="OnMyButtonClick" />
</contextMenu>
</contextMenus>
</customUI>