Hi,
like vkon said - simply use a widget which supports rearranging of columns.
A widget which supports sorting, resizing, and rearranging of columns is for example Tk::MListbox.
If you want to bind shortcuts to that widget, please note that there is a trick to it Some Tk::TableMatrix and Tk::MListbox excentricities.
This widget is to slow for 10 000 entries, but if you are going to put less than 1000 into it, it should be fast enough.
The tablelist mentioned by vkon could be a good solution aswell, if you can use Tcl::Tk. (Depends on whether you are allowed to install tcl::tk, and whether you have to compile your programm.)