Reference/!execute
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!execute
command
This command will execute 'command' using a call to CreateProcess(). Unlike !system, it does not use the command line processor, so input/output redirection and commands like 'cd', 'dir' and 'type' can not be used. !execute also ignores the return value of the executed command. Currently, the only known advantage of !execute over !system is that it does not give trouble when the current working directory is specified using UNC.
On POSIX platforms, !execute will use system() just like !system.
!execute '"%WINDIR%\notepad.exe" "${NSISDIR}\license.txt"'
Command introduced with NSIS v2.01
