This example adds a check box to the active document.
ActiveDocument.Shapes.AddOLEControl ClassType:="Forms.CheckBox.1"
This example adds a combo box to the active document.
ActiveDocument.Shapes.AddOLEControl ClassType:="Forms.ComboBox.1"
This example adds a check box to the active document, clears the check box, and then adds a caption for it.
Set myCB = ActiveDocument.Shapes _
.AddOLEControl(ClassType:="Forms.CheckBox.1")
With myCB.OLEFormat.Object
.Value = False
.Caption = "Check if over 21"
End With