>>How to know if a form is activated before.
>>Thanks
>
>Do you mean if you have another instance of this form already running? In this case you can go through _screen.forms collection and get the name from there. For example:
>
>FOR EACH loForm IN _screen.forms
>IF loForm.Name = "myForm"
>WAIT WINDOW "my form is already running"
>exit
>ENDIF

Thanks for your help