What is the best way to open a file with its associated application from TCL?

Question

I have a TCL/TK app on Windows. What is the best way to open a file with its associated program? For example, I am generating a PDF, and I want it to open automatically.

Answer 1

I would write (for Tcl 8.5)

exec {*}[auto_execok start] "" $filename

(discussion here). That may display a cmd window though.

If you have an earlier Tcl,

eval exec [auto_execok start] {""} [list $filename]