Can I change the value of TARGETDIR from custom action

[Manish]

I have a Custom action (.dll) for InstallInitialize. I want to install my product at a location relative to my other already installed application. Can I change the TARGETDIR. I tried using MsiSetProperty, but msi gave an error ("main class not found") and got hung.

Please help!!

[Manish]

I got this one again. I used MsiSetTargetPath and passed "TARGETDIR" and the path I want it to install. (The "main class" problem was due to some other reason and has been reolved)

It works fine.

Uninstall also works fine. But for one problem - When I use MsiGetTargetPath and pass "TARGETDIR", it returns the default path for installation and NOT the one I had set with MsiSetTargetPath.

Please help as I am new to MSI,

Regards,

Manish

[Cata]

When does MsiGetTargetPath return the default path instead the one you set?

I understand install works and so does the uninstall. What does go wrong?