// Display Add/Edit form for adding a course. Added course will
// arrive via custom event to registered handler.
private void btnAdd_Click(object sender, EventArgs e)
{
Hide();
var dlg = new frmAddEdit();
dlg.CourseAddedEdited += CourseAdded;
dlg.ShowDialog(this);
Show();
}
// Display Add/Edit form for editing a selected course. The edited
// course will arrive via a custom event to the registered handler.
private void btnEdit_Click(object sender, EventArgs e)
{
Hide();
var dlg = new frmAddEdit();
dlg.CourseAddedEdited += CourseEdited;
dlg.CourseName = lstPending.SelectedIndex != -1 ?
lstPending.SelectedItem.ToString() :
lstComplete.SelectedItem.ToString();
dlg.ShowDialog(this);
Show();
DisableButtons();
}