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.

[saff]

its a login form, so i want to show the login form (which is the main form) from form 2 once a button is clicked

saff

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Added after 9 minutes:

the main form loads but then exits straight away.

[FelixB]

what is your login form supposed to be? a modal dialog?

[squidge]

try loginForm->exec()