private void addBooksToolStripMenuItem_Click(object sender, EventArgs e)
{
pnlMain.Hide();
frmAddBooks addBooksForm = new frmAddBooks();
addBooksForm.MdiParent = this;
addBooksForm.Show();
}
private void toolAddBooks_Click(object sender, EventArgs e)
{
pnlMain.Hide();
Form activeChild = this.ActiveMdiChild;
frmAddBooks bookAddForm = new frmAddBooks();
if (activeChild == null)
{
bookAddForm.Show();
bookAddForm.MdiParent = this;
}
else
{
activeChild.Close();
bookAddForm.Show();
bookAddForm.MdiParent = this;
}
}