private void SetSortIcon(int columnIndex, SortOrder order)
{
IntPtr columnHeader = NativeMethods.SendMessage(base.Handle, 4127, IntPtr.Zero, IntPtr.Zero);
for (int columnNumber = 0; columnNumber <= base.Columns.Count - 1; columnNumber++)
{
IntPtr columnPtr = new IntPtr(columnNumber);
NativeMethods.LVCOLUMN lvColumn = default(NativeMethods.LVCOLUMN);
lvColumn.mask = 4;
NativeMethods.SendMessage(columnHeader, 4619, columnPtr, ref lvColumn);
if (order != SortOrder.None && columnNumber == columnIndex)
{
switch (order)
{
case SortOrder.Ascending:
lvColumn.fmt &= -513;
lvColumn.fmt |= 1024;
break;
case SortOrder.Descending:
lvColumn.fmt &= -1025;
lvColumn.fmt |= 512;
break;
}
}
else
{
lvColumn.fmt &= -1537;
}
NativeMethods.SendMessage(columnHeader, 4620, columnPtr, ref lvColumn);
}
}
public static extern IntPtr SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, ref NativeMethods.LVCOLUMN lPLVCOLUMN);
