private void variables_btn_Click(object sender, EventArgs e)
{
if (variablesForm == null)
{
variablesForm = new VariablesForm();
variablesForm.FormClosed += VariablesForm_FormClosed;
}
this.Hide();
variablesForm.Show();
}
private void PressureForm_FormClosing(object sender, FormClosingEventArgs e)
{
VariablesForm variables = new VariablesForm();
variables.Show();
}