## Virtual Device Driver Reference for OS/2

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### VDHArmVPMBPHook Parameter - HookHandle

HookHandle (HHOOK) Hook handle allocated with VDHAllocHook.

The hook routine interface:

     VOID HOOKENTRY fnarm(pRefData, pcrf)

          ENTRY    pRefData - Pointer to hook-specific reference data

                   pcrf     - Pointer to client register frame

          EXIT     None

          CONTEXT  DOS session-task