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What should one do for user mode communication in WDF model?
1. The OSR inverted call article.
2. There seems to be a solution introduced in toaster sample named "sideband filter"
3. The sideband filter source documentation say there is an alternate method introduced in kbfilter
4. some built in communication mechanism I am not aware of?
My need is kernel querying user-mode and receive the answer synchronously.
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