c# - How can i cancel/abort an installation from msi which was started with MsiInstallProduct

Question

i have started an installation from msi with MsiInstallProduct. Furthermore i have set a MsiSetInternalUI and MsiSetExternalUIRecord.

How can i tell the installation to stop and perform a rollback.

Have i to perform MsiDoAction with a special command?

Thanks in advance.

Answer 1

If you're trying to cause (or simulate) a user canceling the installation, then you need to return ERROR_INSTALL_USEREXIT from your UI's callback function. This only works in response to some of the messages your callback function will receive.