<customUI xmlns="http//schemasmicrosoftcom/office/2"> <ribbon startFromScratch="false">

<customUI xmlns="http://schemas.microsoft.com/office/2...">

<ribbon startFromScratch="false">

<tabs>

<tab id="customTab" label="Menu mới" keytip = "Z">

<group id="Trang1" label="Trang 1">

                     <splitButton id="splitButton" size="large" >

                        <button id="button" imageMso="HappyFace" label="Split Button" keytip = "o"/>

                        <menu id="menu">

                            <button id="button1" label="Button 1" />

                            <button id="button2" label="Button 2" />

                        </menu>

                    </splitButton>

                    <button id="customButton" label="Custom Button" 

imageMso="HappyFace" size="large" onAction="Callback" />

</group>

<group id="Trang2" label="Trang 2">

<button id="cmdbu1" label="Nút 1" 

imageMso="HappyFace" size="large" onAction="Callback" />

</group>

<group id="Trang3" label="Trang 3">

<button id="cmdbu2" label="Nút 1" 

imageMso="HappyFace" 

screentip ="Nút mới" supertip ="HCC"

size="large" onAction="Callback" />

</group>

</tab>

</tabs>

</ribbon>

</customUI>