Code:
Sub MyBullet()
'
' MyBullet Macro
'
'
' The variable "char" will contain
' the number of characters moved.
Dim char As Long
char = Selection.StartOf(Unit:=wdParagraph, Extend:=wdMove)
Selection.TypeText Text:=vbTab & "•" & vbTab
Selection.Style = ActiveDocument.Styles("MyBullet")
End Sub