Parameters
hWnd identifies the current window of the application.
dwConversation identifies the conversation handle returned from either EHNAPPC_Allocate or EHNAPPC_ExtendedAllocate.
bType identifies the type of deallocation the client
is to perform. Possible values are:
- EHNAPPC_DEALLOCATESYNCLEVEL (0)
- EHNAPPC_DEALLOCATEFLUSH (1)
- EHNAPPC_DEALLOCATEABEND (2)