Hi Cetin,

I think you meant ! ISNULL(.oCaller) or NOT ISNULL(.oCaller)


>>Sorry but it took me quite a while programming in foxpro again. I'm working with two maximized forms. I have a button in form1 with do form2. In form2 I have another button that releases it. So, how can I go back again to form1?
>

>* button1
>do form2 with thisform
>
>*form2.init
>lparameters oCaller
>this.addproperty("oCaller",m.oCaller)
>
>*form2 button
>with thisform
>if type(".oCaller") = "O" and ;
> Isnull(.oCaller) and ;
> lower(.oCaller.Baseclass) == "form"
> .oCaller.Show()
>endif
>.release()
>endwith
>

Cetin