C # TreeView Continuous Click does not trigger Aftercheck event

Create a class TreeView2

Namespace System.Windows.Forms
{public
    class Treeview2:treeview
    {
        protected override void WndProc ( Ref message M)
        {
            if (m.msg!= 0x203)
            {
                base. WndProc (ref m);}}}

The foreground then places a TreeView control. Name: TreeView1

Background code:

private void Form3_load (object sender, EventArgs e) {//test data TreeNode t = new TreeNode ();

            T.text = "All Permissions";
            TreeNode T1 = new TreeNode (); T1.
            Text = "Member consumption";

            T.nodes.add (t1);
                for (int i = 0; i < i++) {TreeNode t2 = new TreeNode (); T2.
                Text = "Test" + i; T1.
            Nodes.Add (T2);
            } this.treeView1.CheckBoxes = true;

        THIS.TREEVIEW1.NODES.ADD (t); } private void Checkallchildnodes (TreeNode TreeNode, bool nodechecked) {foreach (TreeNode no De in Treenode.nodes) {node.
                Checked = nodechecked; if (node. Nodes.count > 0) {this.
                Checkallchildnodes (node, nodechecked);
        }} private void Treeview1_aftercheck (object sender, TreeViewEventArgs e){if (e.action!= treeviewaction.unknown) {if (E.node.nodes.count > 0) {this.
                Checkallchildnodes (E.node, e.node.checked); }
            }
        }

Finally, replace the TreeView in the Form3.Designer.cs file with our TreeView2