private void addTextFileToLesson_Click(object sender, EventArgs e)
{
if (tr == null)
{
tr = new TXTreader();
tr.MdiParent = this;
tr.FormClosed += new FormClosedEventHandler(tr_FormClosed);
tr.Show();
tr.changeDir(cdir + "\\" + lesson, lesson);
}
else
{
tr.Activate();
}
}
private void OpenTXTBtn_Click(object sender, EventArgs e)
{
TXTreader txt = new TXTreader();
txt.Show();
}
void tr_FormClosed(object sender, FormClosedEventArgs e)
{
tr = null;
}