private void StartButton_Click(object sender, EventArgs e)
{
if (_oldAppForm == null)
{
_oldAppForm = new OldAppForm();
_oldAppForm.Show();
_oldAppForm.FormClosed += new FormClosedEventHandler(OldAppForm_FormClosed);
}
else
{
MessageBox.Show("App already startet.", "Start", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
private void OldAppForm_FormClosed(object sender, FormClosedEventArgs e)
{
this._oldAppForm.Dispose();
this._oldAppForm = null;
}
