VB.NET Show Preview Form from file

Hi everybody..

now i am generating forms with codes dynamically.. (like a code generator) and save it as a file in harddisk (filename.vb, filename.designer.vb)

code Code:

dim od as new openfiledialog
od.filter="Vb Files Only!*.vb"
od.showdialg()   '' i select file 
if od.Filename <> "" then 
''    How can i create object of selected form (from file) 
''    create object of od.filename
end if

but the problem is..
how i show preview of those forms at runtime..?

is there any way in dotnet for adding forms in my project?

am using vb.net 2005