No, Qt does not have API for that. You’ll have to use platform specific API’s. That should not be a problem, since installers are generally windows-specific anyway.

that means i have to use windows specific apis in my Qt App. the thing is this installer can be used on Unix too.

I would suggest you use the appropriate linux packaging system for deployment on linux.

You can use #ifdef Q_OS_WIN or something to mask out your windows code when not building on windows or put the OS specific code into separate files and have the build system sort out which object files to link together.