private void trợGiúpToolStripMenuItem_Click(object sender, EventArgs e)
{
frmHelp help = new frmHelp();
this.Hide();
help.Show();
}
private void btnGiupdo_ItemClick(object sender, ItemClickEventArgs e)
{
frmHelp giupdo = new frmHelp();
giupdo.Show();
}
private void btnGiupdo_ItemClick(object sender, ItemClickEventArgs e)
{
frmHelp giupdo = new frmHelp();
giupdo.Show();
}