ListView Final Column Autosize creates scrollbar

Question

I am implementing a custom control which derives from ListView.

I would like for the final column to fill the remaining space (Quite a common task), I have gone abou

Answer 1

This code works very well for me:

const int SWP_NOSIZE = 1;
[StructLayout(LayoutKind.Sequential)]
public struct WINDOWPOS
{
    public IntPtr hwnd;
    public IntPtr hwndInsertAfter;
    public int x;
    public int y;
    public int cx;
    public int cy;
    public int flags;
}
protected override void WndProc(ref Message m)
{
    switch (m.Msg)
    {
        case 0x46: // WM_WINDOWPOSCHANGING
            this.HandleWindowPosChanging(ref m);
            base.WndProc(ref m);
            break;
        default:
            base.WndProc(ref m);
            break;
    }
}
protected virtual void HandleWindowPosChanging(ref Message m)
{
    try
    {
        WINDOWPOS pos = new WINDOWPOS();
        pos = (WINDOWPOS)System.Runtime.InteropServices.Marshal.PtrToStructure(m.LParam, pos.GetType());
        if (m_EnableAutoColumnResize && this.Columns.Count > 0 && (pos.flags & SWP_NOSIZE) == 0)
        {
            this.ResizeFreeSpaceFillingColumns(pos.cx - (this.Bounds.Width - this.ClientSize.Width));
        }
    }
    catch (ArgumentException) { }
}

private void ResizeFreeSpaceFillingColumns(int listViewWitdh)
{
    int lastColumn = this.Columns.Count - 1;
    int sumWidth = 0;

    for (int i = 0; i < lastColumn; i++)
    {
        sumWidth += this.Columns[i].Width;
    }
    this.Columns[lastColumn].Width = listViewWitdh - sumWidth;
}

Regards Lary