Layout Designer ???

I need some confirmation/advice on some issues I am noticing when using the UI and Print Layout Designer.

1.Adding buttons to system forms. I capture the et_FORM_LOAD event and add the button, Can I display an on-screen report with selection criteria. (Something similar to Reports/Inventory/Items list) from the click event ??

2. This time I do this follow the steps ...

1.) I Added buttons to system forms .

2.) I send a click using UIAPI on the button to select any of the Query and click the 'Layout display' button on the Application tool bar.

3.) I can display Report by UPDATE sql statement in table RDOC , but I can't display variable from VB.net code to 'Layout display'.

Best regards,