Prueba de ésta manera:
Cita: Dim sJS As String = "<script language=""Javascript"">" & _
"window.open('webform1.aspx?lg=" & TxtFrase.Text & "'," & _
"'a','width=820,height=290,scrollbars=1,resiza ble =0'');</script>"
Response.Write(sJS)
Y ya en tu pagina destino (webform1.aspx) la recoges normal:
Cita: Response.Write(Request.Params("lg"))
Salu2