umnHeader object to allow the order of the column headers to be read
and set programmatically.</p><p class="update">Insert before parameter to the <span class="code">Add</span> method
of the ListItems collection was ignored.  Corrected.</p><p class="update">Setting a column alignment to right caused the column to be
centred, and vice-versa. Fixed.</p><p class="update">Mouse Up events were only generated for double-clicks.  Now
corrected.</p><p class="update">A <span class="code">KeyDown</span> event was gen