Reorder and resize "COLUMNHEADER" elements

[Gintaras]

If it's a classic header control (class name SysHeader32), probably can be used message HDM_SETITEM. But it's not easy, because need to use process memory, know indices, use different code for 64 and 32 bit process, maybe DPI-scale.

Maybe better to use drag-and-drop. Can record it, or get column rectangles and write mouse-drag code.