WD22 - OpenSister without focus

Hi all,
i have a window that implement an assisted imput on edt control.

I use this code in "Whenever modifying" event:

IF WinStatus(WIN_IW_Ricerca_Articoli)=NotFound THEN
	nXpos,nYpos is int
	nXpos=WIN_Movimenti_Magazzino..X+EDT_Codice_Articolo..X
	nYpos=WIN_Movimenti_Magazzino..Y+EDT_Codice_Articolo..Y+EDT_Codice_Articolo..Height+27
	OpenChild("WIN_IW_Ricerca_Articoli, "+nYpos+", "+nXpos+AboveAll,EDT_Codice_Articolo)
	
	SetFocus(EDT_Codice_Articolo)
ELSE
	WIN_IW_Ricerca_Articoli.CercaArticoli(EDT_Codice_Articolo)
END

Work fine but, after the first character the "SetFocus" select all text in "EDT_Codice_Articolo".

There is a method to Open the window without the focus on it?
Or, there is a method to SetFocus without the total selection of a text?

Thanks