This call deregisters a alternate video subsystem previously registered within a session.

Syntax

VioDeRegister()

Parameters

rc (USHORT) - return:Return code descriptions are:

0 NO_ERROR

404 ERROR_VIO_DEREGISTER

430 ERROR_VIO_ILLEGAL_DURING_POPUP

465 ERROR_VIO_DETACHED

494 ERROR_VIO_EXTENDED_SG

Remarks

VioDeRegister must be issued by the same process that issued the previous VioRegister. After VioDeRegister is issued, subsequent video calls are processed by the Base Video Subsystem.

Bindings

C

#define INCL_VIO USHORT rc = VioDeRegister(VOID); USHORT rc; /* return code */

MASM

EXTRN VioDeRegister:FAR INCL_VIO EQU 1 CALL VioDeRegister Returns WORD

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