How to run exe files in NSIS Script?

Question

In InnoSetup, there is a part called run which will execute the exe, batch file and msi. We can also give command line parameters to this run.

I provide

Answer 1

You have 3 NSIS instructions that can start a new process: Exec, ExecWait and ExecShell (Internally the first two use CreateProcess and the last one uses ShellExecute)

In all cases SetOutPath sets the working directory for the child process.

It is important to get the quoting correct since NSIS has 3 quote characters and windows paths with spaces should be quoted with ":

ExecWait '"$instdir\myapp.exe"'
Exec '"$instdir\otherapp.exe" param1 "par am 2" param3'