Hi Kevin.

>Will any references to this.oApp go back to the data-session that poApp was created in, or will it stay within the current form's datasession?

Any code you run in methods of poApp will execute in the datasession that poApp was created in. You'll see this if you trace code from the form calling a This.oApp method -- the value of SET('DATASESSION') will switch as execution moves to the poApp method and back again upon return to the form method.

Doug