Checkbox on the ColumnHeader [modified]

[Natural_Demon]

i would like to achieve a checkbox on a ColumnHeader in a listview. i have been trying for days. i have achieved a checkbox on the right spot in the listview by virtual placing it on top. [DllImport("user32")] private static extern IntPtr SetParent(IntPtr hWndChild, IntPtr hWndNewParent); protected override void OnHandleCreated(EventArgs e) { SetParent(_cCehckBox.Handle, Handle); base.OnHandleCreated(e); } but the visual style/effect of the header causes the checkbox to fall in the background if you hover the mouse of the header. the Header class doesn't provide anu usefull stuff, atleast i don't see any usefull stuff. i have bene reading alot about it and viewed many things regarding headers. i have also been using ... protected override void WndProc(ref Message message) { .... } filtering on WM_NOTIFY for 'HDN_ITEMCHANGINGA', 'HDN_ITEMCHANGEDA', 'HDN_BEGINTRACKA', 'HDN_BEGINTRACKW'. i used a piece of code from a project here on codeproject, virtually unchanged. but i only get the windows handle, the other things are empty.

    \[StructLayout(LayoutKind.Sequential)\]
    private struct NMHDR
    {
        public IntPtr hwndFrom;
        public int idFrom;
        public int code;
    } //NMHDR


    //OnMessageNeedsSending(message.ToString(), Color.Black);
        // pass messages on to the base control for processing

        base.WndProc(ref message);
        \*/
        const int WM\_NOTIFY = 0x004E;
        const int HDN\_FIRST = (0 - 300);
        const int HDN\_BEGINTRACKA = (HDN\_FIRST - 6);
        const int HDN\_BEGINTRACKW = (HDN\_FIRST - 26);
        bool callBase = true;

        switch (message.Msg)
        {
            case WM\_NOTIFY:
                
                NMHDR nmhdr = (NMHDR)message.GetLParam(typeof(NMHDR));
                OnMessageNeedsSending("WM\_NOTIFY " + message, Color.Black);
                OnMessageNeedsSending("code: " + nmhdr.code + ", hwndFrom: " + nmhdr.hwndFrom + ", idFrom: " + nmhdr.idFrom, Color.Black);
                switch (nmhdr.code)
                {
                    case HDN\_BEGINTRACKA:  //Process both ANSI and
                        OnMessageNeedsSending("HDN\_BEGINTRACKA " + message, Color.Black);
                        break;
                    case HDN\_BEGINTRACKW:

[Natural_Demon]

i extented ...

    \[StructLayout(LayoutKind.Sequential)\]
    private struct NMHDR
    {
        public IntPtr hwndFrom;
        public int idFrom;
        public int code;
    } //NMHDR

to ...

    \[StructLayout(LayoutKind.Sequential)\]
    private struct NMHDR2
    {
        public IntPtr hwndFrom;
        public int idFrom;
        public int code;
        public int coder;
    } //NMHDR

this new variable 'coder' contains numbers, like: -12, -16, -23 -320, -321, -326 -327, -530 -12 and -530 seam to be mouseover and mouseleave. -16 and -326 seam to be mouseclick / down and mouse release. i posted a logoutput. http://pastebin.com/HuCk5cac[^] anyone experienced with this?

Bad = knowing 2 much

modified on Tuesday, April 27, 2010 2:47 PM

[Natural_Demon]

this is the entire code to create a listview with a checkbox in the left upper corner of the ListView. NM_CUSTOMDRAW seams to be the message when the mouse hover over the headers. but i fail to keep the checkBox visible / ontop @ all time. if you slightly hoover of the first header, the headers mousehover effect draws over the check. anyone an idea how to prevent this?

using System;
using System.Drawing;
using System.Runtime.InteropServices;
using System.Windows.Forms;

namespace Listview_Colum_header_checkbox
{
class CCehckBox2 : CheckBox
{
public CCehckBox2()
{
Width = 14;
Height = 14;
}
}

class CustomChechBox2 : Control
{
    readonly CCehckBox2 \_chb = new CCehckBox2();
    public CustomChechBox2()
    {
        Size = new Size(16, 16);
        \_chb.Location = new Point(0, 0);
        Controls.Add(\_chb);
    }
}

class CListview2 : ListView
{
    public delegate void MessageNeedsSendingCallback(string message, Color color);
    public event MessageNeedsSendingCallback OnMessageNeedsSending;


    //private readonly CCehckBox \_cCehckBox = new CCehckBox();
    private readonly CustomChechBox2 \_cCehckBox = new CustomChechBox2();

    private readonly ColumnHeader \_header1, \_header2, \_header3 = new ColumnHeader();
    #region  PInvoke Declarations

    \[DllImport("User32", CallingConvention = CallingConvention.Cdecl)\]
    private static extern uint RealGetWindowClass(IntPtr hwnd, System.Text.StringBuilder pszType, int cchType);

    \[DllImport("user32")\]
    private static extern IntPtr SetParent(IntPtr hWndChild, IntPtr hWndNewParent);

    \[DllImport("user32.dll")\]
    private static extern IntPtr SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, IntPtr lParam);

    #endregion

    public CListview2()
    {
        View = View.Details;
        //this.HeaderStyle = ColumnHeaderStyle.Nonclickable;
        //\_header1.
        \_header1 = Columns.Add("");
        \_header1.Width = (Location.X + 5) + 12;
        //\_header1.AutoResize(ColumnHeaderAutoResizeStyle.ColumnContent);
        \_header1.Name = "CheckBox";
        \_header1.DisplayIndex = 0;

        \_header2 = Columns.Add("bah");
        \_header2.Width = 50;

        \_header3 = Columns.Add("boh");
        \_header3.Width = 50;

        var wijd = \_cCehck