Using PatchCreation

[yuvnith]

We are looking for ways to use WiX v4 to build an MSP file, and in the process, we discovered that we could use the Patch Creation Process.
When using PatchCreation and "Patch" as the OutputType in.wixproj, we receive a compiler error that states
No transforms were provided to attach to the patch.

However, if we set "PatchCreation" as the OutputType, we receive a compiler error saying
Unable to find a backend to process output type

After exploring through the WiX 4* source code, found that OutputType PatchCreation was commented in WindowsInstallerBackendFactory.cs which uses PatchCreationBackend

Could someone be kind enough to clarify to me on how to utilize patchcreation correctly and as expected?

[robmen]

Patch creation has never been supported using a .wixproj. It would have been really hard in WiX v3. In WiX v4+, it's probably not nearly as hard, but no one has done the additional work to enable it. Today you have to use the command-line to build patches.

[yuvnith]

Thank you for the response @robmen