How to add Content Controls using VBA

Add Combobox to Word document using VBA
The following code would add a Combo Box control to the existing Word document:

Sub Add_A_ContentControl()

Dim oCC As ContentControl

Set oCC = ActiveDocument.ContentControls.Add(wdContentControlComboBox, Selection.Range)
oCC.SetPlaceholderText , , "Which Team Won the World Cup 2010"

oCC.Title = "World Cup Teams"
oCC.DropdownListEntries.Add "Spain", 1
oCC.DropdownListEntries.Add "Netherlands", 0
oCC.DropdownListEntries.Add "France", 2
oCC.DropdownListEntries.Add "Uruguay", 3

' Prevents the Control from being deleted
oCC.LockContentControl = True
End Sub

Lock the control by setting the LockContentControl attribute to prevent it getting accidentally deleted.

The content control gets added as shown below
Combobox Content Control in Word VBA