How to check for cancel button in custom action without doing anything else.
- by Curtis J
I know when I put something in the log using ::MsiProcessMessage(hModule, INSTALLMESSAGE(INSTALLMESSAGE_INFO), ...); that I can check if the return value is IDCANCEL and return ERROR_INSTALL_USEREXIT to Windows installer.
How do I do that without having to put something in the log or alter the progress bar?