Dynamically loading forms based only on a string

I have a combobox with form names in it.  I would like to take the text name of those forms, hit an event handler, and dynamically load the selected form.  Unfortunately, I keep getting stuck.  I'm looking for something along the lines of the code I wrote below (though obviously it doesn't actually work).

Thanks in advance for any help!


Dim x as string
x = "Form2"

Dim obj as object
obj = CType(obj, gettype(x)).ShowDialog