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Tcl/tk parallel execution

Tcl/tk parallel execution

(OP)
Hi team,
I am new to tcl threading, so kindly help me to implement parallel execution of tcl script.

Tried:(Code)
puts "start"
set tid [thread::create ] ;# Create a thread
thread::send $tid {exec c:/windows/system32/notepad.exe &}
puts "end"

current execution flow:
Executing "notepad.exe" out showing any log and when I am existing notepad then only I am able see both the log.
start
end

Desired output:
start
--> should execute "notepad.exe" separately without effecting other .
end // with out exiting notepad.








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