CommandBarComboBox interface
Office 2013 and later
Represents a combo box control on a command bar.
Namespace: Microsoft.Office.Core
Assembly: office (in office.dll)
Use Controls(index), where index is the index number of the control, to return a CommandBarComboBox object. (The Type property of the control must be msoControlEdit, msoControlDropdown, msoControlComboBox, msoControlButtonDropdown, msoControlSplitDropdown, msoControlOCXDropdown, msoControlGraphicCombo, or msoControlGraphicDropdown.)
You can also use the FindControl method to return a CommandBarComboBox object.
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