Table of Contents
This is part of Family API which allow to create dual-os version of program runs under OS/2 and DOS
Note: This is legacy API call. It is recommended to use 32-bit equivalent
VioDeRegister
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