How to click item on first form while having another form open

Question

Example image:

I just want to know how to click something on the parent form while the child is active!

Why I want it: Users may need to access one dialog while looking at another.

Answer 1

Displaying a form with call:

new Form2().showDialog();

Will not allows you to click on the form1 .

new Form2().show();

Will allow you to click parent form1 .

Answer 2

Suggested by David Pilkington .

I fixed it by going from:

form.ShowDialog(this);

to:

form.Show(this);

thank you!

Answer 3

quite simply (re-factored) you can use this.

//Open as dialog
new Form2().showDialog();
//Open as new instance
f2 = new Form2();
f2.Show();