make sure you got SQLBASEOLEDB 1.0 in your reference, then type this code :
Dim objSQLBaseServer As SQLBASEOLEDBServer
Set objSQLBaseServer = New SQLBASEOLEDBServer
Dim strServer As String
Dim strPwd As String
strServer = "SERVER1"
strPwd = ""
objSQLBaseServer.ConnectServer strServer, strPwd
objSQLBaseServer.DisconnectServer
MsgBox "CONNECTED ON " & strServer & " w/ SQLBASEOLEDBServer"