auto_execok is one of several ''commands'' documented at
http://www.tcl.tk/man/tcl8.4/TclCmd/library.htm 


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Canonical example usage:
    eval exec [auto_execok dir] *.$suffix

[[Explain why this is better than $::env(COMSPEC), cmd.exe, ...]]

[LES] on June 1st, 2004: '''Yes, please, do that'''. :-)

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To demonstrate why [[eval]] is required:
 % auto_execok start
 C:/WINNT/system32/CMD.EXE /c start
 % exec [auto_execok start] http://wiki.tcl.tk
 couldn't execute "C:\WINNT\system32\CMD.EXE \c start": invalid argument
 % eval exec [auto_execok start] http://wiki.tcl.tk
 % # success



Note that if any arguments to "start" have spaces in them, you have to list-protect them from [eval]

 % set mydoc "My document.doc"
 % eval exec [auto_execok start] $mydoc
 % # msword may complain about being unable to find "My" and "document.doc"'
 % eval exec [auto_execok start] [list $mydoc]; # should be more successful






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See also [exec], [Invoking browsers], 


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