Adding buttons to custom tab

Hi Pike, thanks for the quick reply.

Yes, I was referring to the ribbon. The editor you sent looks interesting, but I dont have admin access to the PC to install it, and I'm not sure it can do what i'm after.

I've tried quite a bit of code, in the 1st workbook, customui.xml, i have

<?xml version="1.0" encoding="utf-8" ?> 
<customUI xmlns="http://schemas.microsoft.com/office/2006/01/customui"> 
<ribbon> 
    <tabs> 
        <tab id="myTab" label="Stuff" keytip="U"> 
            <group id="group" label="group"> 
	    <button 
                     id="stuff1" 
                     label="dostuff" 
                     imageMso="FileCheckIn" 
                     size="large"
                     onAction="dostuff" 
                />
            </group>
        </tab> 
    </tabs> 
</ribbon> 
</customUI>

The macro 'dostuff' then loads a second file, it's the xml in this file that i'm not sure of. I've tried variations around the following

<?xml version="1.0" encoding="utf-8" ?> 
<customUI xmlns="http://schemas.microsoft.com/office/2006/01/customui"> 
<ribbon> 
    <tabs> 
        <tab id="myTab"> 
            <group id="group"> 
	    <button 
                     id="stuff2" 
                     label="domorestuff" 
                     imageMso="FileCheckIn" 
                     size="large"
                     onAction="domorestuff" 
                />
            </group>
        </tab> 
    </tabs> 
</ribbon> 
</customUI>

where the macro 'domorestuff' is in the second addin. This doesn't work. I have tried playing around with the <tab> and <group> tags, and tried calling the name as a tabMSO, which doesn't work.

Thanks again,

Mat

Working xml for customui.xml in both files...

<?xml version="1.0" encoding="utf-8" ?> 
<customUI xmlns="http://schemas.microsoft.com/office/2006/01/customui" xmlns:nsMat="MatNamespace"> 
<ribbon> 
    <tabs> 
        <tab id="nsMat:myTab" label="Stuff" keytip="U"> 
            <group id="group" label="group"> 
	    <button 
                     id="stuff1" 
                     label="dostuff" 
                     imageMso="FileCheckIn" 
                     size="large"
                     onAction="dostuff" 
                />
            </group>
        </tab> 
    </tabs> 
</ribbon> 
</customUI>

<?xml version="1.0" encoding="utf-8" ?> 
<customUI xmlns="http://schemas.microsoft.com/office/2006/01/customui" xmlns:nsMat="MatNamespace> 
<ribbon> 
    <tabs id="nsMat:myTab" label="Stuff" keytip="U"> 
        <tab id="myTab"> 
            <group id="group2" label="group"> 
	    <button 
                     id="stuff2" 
                     label="domorestuff" 
                     imageMso="FileCheckIn" 
                     size="large"
                     onAction="domorestuff" 
                />
            </group>
        </tab> 
    </tabs> 
</ribbon> 
</customUI>

Code shown adds a new group, but I imagine it's fairly straightforward to add buttons to an existing group, (although I haven't tried)

Thanks again to everyone who replied!

Mat

Cheers andy, I've figured out what is needed, will post the correct code once I've got it working!

Mat