Gallery

Sample Ribbon XML file:

<customUI xmlns="http://schemas.microsoft.com/office/2006/01/customui">
    <ribbon startFromScratch="false">
        <tabs>
            <tab id="MyTab" label="My Tab">
                <group id="MyGroup" label="My Group">
                    <labelControl id="myLabel1" label="Sample:" />
                    <labelControl id="myLabel2" label="Gallery" />
                    <gallery id="MyGallery" 
                             imageMso="DateAndTimeInsert"
                             label="Select a month:" 
                             columns="3" 
                             rows="4"
                             onAction="MyGallerySelMonatCallbackOnAction" >
                        <item id="itmGall1" label="January" imageMso="LassoSelect"/>
                        <item id="itmGall2" label="February"
                          imageMso="AppointmentColorDialog"/>
                        <item id="itmGall3" label="March" imageMso="LassoSelect"/>
                        <item id="itmGall4" label="April"
                          imageMso="AppointmentColorDialog"/>
                        <item id="itmGall5" label="May" imageMso="LassoSelect"/>
                        <item id="itmGall6" label="June"
                          imageMso="AppointmentColorDialog"/>
                        <item id="itmGall7" label="July" imageMso="LassoSelect"/>
                        <item id="itmGall8" label="August"
                          imageMso="AppointmentColorDialog"/>
                        <item id="itmGall9" label="September" imageMso="LassoSelect"/>
                        <item id="itmGall10" label="October"
                          imageMso="AppointmentColorDialog"/>
                        <item id="itmGall11" label="November" imageMso="LassoSelect"/>
                        <item id="itmGall12" label="December"
                          imageMso="AppointmentColorDialog"/>
                        <button id="MyButton" label="Button in gallery"
                           onAction="MyButtonCallbackOnAction"
                           imageMso="HappyFace"/>
                    </gallery>
                 </group>
            </tab>
        </tabs>
    </ribbon>
</customUI>

Attributes: columns, description, enabled, id, idMso, idQ, image, imageMso,
                 insertAfterMso, insertAfterQ, insertBeforeMso, insertBeforeQ,
                 itemHeight, itemWidth, keytip, label, rows, screentip, showImage,
                 showItemImage, showItemLabel, showLabel, size, sizeString,
                 supertip, tag, visible

                 Added in O2010: invalidateContentOnDrop 

Callbacks: getDescription, getEnabled, getImage, 
                  getItemCount, getItemHeight, getItemID, getItemImage,
                  getItemLabel, getItemScreentip, getItemSupertip,
                  getItemWidth, getKeytip, getLabel, getScreentip,
                  getSelectedItemID, getSelectedItemIndex,
                  getShowImage, getShowLabel, getSize, getSupertip,
                  getVisible, onAction

You can find this sample in Sample DB 1