How to execute program before the uninstallation starts?

inno-setup, uninstallation

Solution

See the documentation on `Setup Script Sections`, particularly the `UninstallRun` one at the bottom of the tree:

[UninstallRun]
Filename: "{app}\INIT.EXE"; Parameters: "/x"

If you need to do something more complex, you can also do it in code using the Pascal scripting functionality in InnoSetup. See `UninstallCodeExample1.iss' in the`InnoSetup 5\Examples` folder.

Problem

Can InnoSetup execute a program before the uninstallation starts? My program creates some registry values. I have an executable that can remove those registry values and my question is, can InnoSetup run that executable before the uninstallation starts?

Original source