call form 1 from form 2

[saff]

How do I call the first form from the second form?

saff

[squidge]

In what way? You want to open the first form? Call some method if it? Access some ui element?

Regardless, it's just standard C++, access the object and use the public methods you disclosed. Note that by default ui elements are private and so can not be accessed from another class.