In the example above USD and EUR are command buttons.
Caption
Text shown on this menu item.
Enabled
State of the item. It item is disabled it can't be selected and shown as grayed.
Image
Image shown on this item. This property is optional. Item can contain text only.
OnAction
Name of the subroutine which it called when command is selected.
Tag
Internal name of this item. You can refer to this item using Tag.
Visible
If this property is set to false, item is hidden.