How to activate Navigation Button ?

Hi,

I write an UI Form with an UDO table,

and I register the form and UDO

as a master type on SBO 2004B.

The form can be insert,update,find mode

and work correctly.

The next step I want to do is to activate

the Navigation Button,and from the

eLearning file I found that the code

should be like this and set the

form mode to be,but it can't work.

'//*************************

'// 6.BrsBtn

'//*************************

' oItem = oForm.Items.Add("BrsBtn", SAPbouiCOM.BoFormItemTypes.it_BROWSE_BUTTON)

' oItem.LinkTo = "EditText1"

Does SBO open this function or not ?

If not,why eLearning show the "SAPbouiCOM.BoFormItemTypes.it_BROWSE_BUTTON"

property ?