As long as your userform is loaded you can retrieve information from any module.
You just have to specifically identify the userform and the control.
from module1 you will call for example
sub myProcedure
msgbox userform1.textbox1.text
end sub

from the userform you can call procedure in any module  for example:
call module1.myProcedure

If you unload the userform, the information it contained will be lost.
Hope this helps