Form produce search result on preview webbrouser

Hello to all! Please help me for the last time!! Find attached an example file on which there are two forms, one (frmGestioneDati) is the data entry form and in the lower right you find a webbrowser window, is it possible to get a preview of the pdf file (outcome of search result record shown in the left side)?
Path of Pdf Files is indicated in the related code.

Is therebody can help me?

Thank you in advance for the cooperation! You are very very kindly.
I also hope it is helpful to other users!!!!!
Hi from Milan (I)

Salvatore