You can use Dependency Walker to check whether a plugin is using either of those runtimes.
i have written Bass_Vis and work with Visualization more then 8 Year
Bass_Vis work with all Option from any VisPlugin to "IN and OUT" i never use any Manifest inside Bass_Vis.
Also any Exe which used Bass_Vis as Wrapper for Visualization then the EXE must have a Manifest when use VIS_MILK2 for Winamp 5.
If not VIS_MILK2 will not RUN.
You can use Manifest inside the EXE or external as MyExeName.Manifest.
Add a Manifest inside XMP-WAVIS.DLL is not correctly.
ok.. no Problem, no source of "XMP-WAVIS" so you can nothing Change or finish missing Action for Visualization.
and using XMP-WAVIS of your own risk.
latest Milkdrop no longer use MSVCR90.DLL runtime so a manifest is not needed
latest Milkdrop use Mousewheel support for Option Dialog which is not Support by XMP-WAVIS (Option Config Dialog will also not run)
and so on...
greets