[Bug 41269] MSI uninstaller does not clean up Registry's UpgradeCode, ProductCode

https://bugs.winehq.org/show_bug.cgi?id=41269

--- Comment #32 from Reinhold  ---
Just want to add:
According to the spec CustomAction DLLs can use MSI error codes as returns. The
according error codes for MSI are defined in WinError.h from the range 1600 to
1699. The Wine installer needs to evaluate the return value which comes from
the CustomActions DLL. Dependant of the error code, an appropriate actions
needs to be taken.