void CreateHistoryForm()
{
historyForm = new HistoryForm();
historyForm.Shown += (s, e) => historyToolStripMenuItem.Checked = true;
historyForm.FormClosing += (s, e) =>
{
e.Cancel = true;
historyForm.Hide();
historyToolStripMenuItem.Checked = false;
};
}
private void historyToolStripMenuItem_Click(object sender, EventArgs e)
{
if (historyForm.Visible)
{
historyForm.Hide();
}
else
{
historyForm.Show();
}
historyToolStripMenuItem.Checked = historyForm.Visible;
}
void CreateHistoryForm()
{
historyForm = new HistoryForm();
historyForm.Shown += (s, e) => historyToolStripMenuItem.Checked = true;
historyForm.FormClosing += (s, e) =>
{
e.Cancel = true;
historyForm.Hide();
historyToolStripMenuItem.Checked = false;
};
}