private void grouperMessageList_CustomPaint(PaintEventArgs e)
{
messagesDataGridView.Size = new Size(grouperMessageList.Size.Width - (messagesDataGridView.Location.X * 2 + 2),
grouperMessageList.Size.Height - messagesDataGridView.Location.Y - messagesDataGridView.Location.X - 2);
e.Graphics.DrawRectangle(new Pen(SystemColors.ActiveBorder, 1),
messagesDataGridView.Location.X - 1,
messagesDataGridView.Location.Y - 1,
messagesDataGridView.Size.Width + 1,
messagesDataGridView.Size.Height + 1);
}