InfoPath Dev

Hi I'm pretty new to Infopath but have done some work in SharePoint. I'm editing forms that I created in Infopath 2010 Designer. How does one use a button on the "landing form" to open another form with a file attachment control and buttons; the user attaches files; and then have those files are passed back to what I'm calling the "landing form"? This is for a customer that wants ensure that when files are attached to the form, there is a message stating that no sensitive information is allowed to be attached. Thanks. V/r, charlie

Well, why not just display some red text in the form? That's a lot simpler than this convoluted approach just to show a popup dialog. You can even have them click an "OK" to enable the control. Use conditional formatting and hide-show to make it dynamic. No need for popups.