Thanks XHXIAIEIN.This post is very important.
It seems that Microsoft's WPF desktop application does not support both transparency and click through of WV2 components (of course, the transparent part is click through, while the opaque part is not).
WV2 is a good technology, it is very lightweight and has good performance, but currently there are not many programs in China that understand this technology, so the solutions we can find are very limited. If you have any ideas, you can also give us a hint first, so that we don't have to search for a suitable solution in a haystack. Please!!