Tabs

OfficeTab

The pre-existing tab to use. Currently, the id attribute can only be "TabDefault".

<VersionOverrides> 
   <Hosts> 
      <Host> 
         <DesktopFormFactor> 
            <ExtensionPoint> 

<OfficeTab id="TabDefault"> 
   <Group/> 

Group - Required. A group of user interface extension points in a tab. A group can have up to six controls. The id attribute is required. It is a string with a maximum of 125 characters.

CustomTab

The id attribute must be unique within the manifest.

<VersionOverrides> 
   <Hosts> 
      <Host> 
         <DesktopFormFactor> 
            <ExtensionPoint> 

<CustomTab id="Better_CustomTab1_ID"> 
   <Group/> 
   <Label/> 

Group - Required. A group of user interface extension points in a tab. A group can have up to six controls. The id attribute is required. It is a string with a maximum of 125 characters.
Label - Required. The label of the custom tab. The resid attribute must be set to the value of the id attribute of a String element in the ShortStrings element in the Resources element.