## Virtual Device Driver Reference for OS/2

[prev][next][parent][TOC]

### VDHOpenVIRQ Parameter - IRETHandler

IRETHandler (PFN) Address of Interrupt Return (IRET) handler.

Linear address of the handler to be called when the IRET in the DOS session 's interrupt code is executed for this IRQ. If this is not desired, set the parameter to 0 (zero). The interface for the IRET routine is:

    VOID HOOKENTRY IRETHdlr(pcrf)

         ENTRY   pcrf - Pointer to client register frame

         EXIT    None

         USES    EAX, ECX, EDX, FS, GS, Flags

         CONTEXT DOS session-task