Hi There,
I've been trying to write a simple program that uses more than one form. My problem is that I have tried to link Form "Home" to form "Numbers" via a button. I've tried many variations but they all seem to create a new form. I already have the 2 forms I need, I just can't seem to link Home to Numbers.
This is where the button code would go:

private void button4_Click(object sender, EventArgs e)

What code should I input?

What do you mean by linking a form? You can open the form:

private void button1_Click(object sender, EventArgs e)
      new frmOtherForm().Show();