You will need to take Graham's suggestion a bit further to set all of the properties you are after:
Code:
Sub ScratchMacro()
'A basic Word macro coded by Greg Maxey
Dim oCtrl As InlineShape
With Selection
.MoveRight Unit:=wdCharacter, Count:=2
Set oCtrl = .InlineShapes.AddOLEControl(ClassType:="Forms.TextBox.1", Range:=.Range)
.MoveLeft Unit:=wdCharacter, Count:=1
.TypeParagraph
End With
With oCtrl.OLEFormat.Object
.Height = 18
.Width = 200
.MultiLine = True
.ScrollBars = 2
End With
lbl_Exit:
Exit Sub
End Sub