## Virtual Device Driver Reference for OS/2

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### VDHQueryHookData - Parameters

HookHandle (HHOOK) Hook handle (from VDHAllocHook) for the hook to query.

rc (PVOID) - returns

Success If the function is successful, it returns a pointer to the reference data block.

Failure If HookHandle is invalid or if there is no reference data (that is, the RefDataSize parameter for VDHAllocHook is 0), a system halt occurs.