Unfortunately, I don't believe that you can. Unless if you made a second form or module that isn't ever visible and then just use form2.(variable name) = whatever and whatever = form2.(variable name). OR module1.(variable name) = whatever and whatever = module1.(variable name)
In form 2. Just declare a public variable. This would set the variable for form 2 and use it.
Public variable:
public variablename as integer