Call PerformClick from another form

[BAILANDO]

Hello, i have 2 forms, one is main where i show tasks created by user and second is for create new task an i want after create call performclick on button which refresh TabList but this function dont work, performclick is not called. Why? Thanks

var frm = (Form1)Owner;
if (frm != null)
{
     frm.button_0.PerformClick();
}

This is Form1

public partial class Form1....
{
    public Button button_0 = new Button();
......

}

[Thomas1965]

Are you sure that frm is != null ?
Try

var frm = (Form1)Owner;
if (frm != null)
{
     frm.button_0.PerformClick();
}
else
   MessageBox.Show("frm is null");

[BAILANDO]

i get frm is null, why?

[Thomas1965]

I guess you didn't set the Owner.

[BAILANDO]

And i need to ask, how can i set owner please?

[Thomas1965]

In your main form you can set the owner of the second form.

Form2 frm2 = new Form2();
frm2.Owner = this;
frm2.ShowDialog();