5.8.8 Delay Unload Import Address Table (UIAT)

The delay UIAT is an optional table of IMAGE_THUNK_DATA items that is used by the unload code to handle an explicit unload request. It is initialized data in the read-only section that is an exact copy of the original IAT that referred the code to the delay load thunks. On the unload request, the library can be freed, the *phmod cleared, and the UIAT written over the IAT to restore everything to its pre-load state.