LogOn LogOff in Analysis?

Hi all

we are using the regular LogOn when refreshing an Analysis Workbook / datasource.

I am aware of the API of Analysis to silently ( no dialog) Login onto BW by providing the

iAppCall = Application.Run("SAPLogon", "DS_1", "MyClient", "MyUser", "MyPWD", "EN")

API call.

In 3tier environment we really need a LogOff functionality, that might allow us to have 3 buttons like:

LogOn DEV

LogOn QA

LogOn Prod

to verify and test query data without closing AO Excel anytime we change the system by just having a LogOff and relogOn  via API & VBA

Does anyone know if there is a hidden feature ( @ Victor: maybe you have a hint )

If not I'll add it to the feature list of AO

Best regards

Joerg