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====== VioDeRegister ======

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


<code c>
VioDeRegister()
</code>

===== 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====
<code c>
#define INCL_VIO

USHORT  rc = VioDeRegister(VOID);
USHORT  rc;            /* return code */
</code>

====MASM====
<code asm>
EXTRN  VioDeRegister:FAR
INCL_VIO            EQU 1

CALL   VioDeRegister

Returns WORD
</code>

[[http://www.edm2.com/index.php/VioDeRegister]]


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