VioDeRegister: Difference between revisions
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{{Legacy | |||
|RepFunc= | |||
|Remarks=This page list the older version of the function for reference. | |||
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This call deregisters a video subsystem previously registered within a session. | This call deregisters a video subsystem previously registered within a session. | ||
Revision as of 22:43, 16 September 2017
 Legacy Function Warning
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| It is recommended to use a newer replacement for this function. | |
| Replacement: | |
| Remarks: | This page list the older version of the function for reference. |
This call deregisters a video subsystem previously registered within a session.
Syntax
VioDeRegister ( )
Parameters
none
Return Code
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.
Example Code
C Binding
#define INCL_VIO USHORT rc = VioDeRegister(VOID); USHORT rc; /* return code */
MASM Binding
EXTRN VioDeRegister:FAR INCL_VIO EQU 1 CALL VioDeRegister Returns WORD