C# (CSharp) ActiveMdiChild.Invalidate Exemples

Exemple #1

        private void undoToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (((List <Bitmap>)(ActiveMdiChild.Tag)).Count > 1)
            {
                ((List <Bitmap>)(ActiveMdiChild.Tag)).RemoveAt(0);
            }

            ActiveMdiChild.Invalidate();
        }