en:docs:fapi:vioscrunlock

This call releases ownership of (unlocks) the physical display buffer.

Syntax

VioScrUnLock (VioHandle)

Parameters

;VioHandle (HVIO) - input : Reserved word of 0s.

Return Code

rc (USHORT) - return Return code descriptions are: * 0 NO_ERROR * 367 ERROR_VIO_UNLOCK * 430 ERROR_VIO_ILLEGAL_DURING_POPUP * 436 ERROR_VIO_INVALID_HANDLE * 465 ERROR_VIO_DETACHED * 494 ERROR_VIO_EXTENDED_SG

Remarks

This call releases the screen lock that is set by VioScrLock. The VioScrUnLock call must be issued by a thread in the same process as the thread that issued VioScrLock.

Family API Considerations

Some options operate differently in the DOS mode than in the OS/2 mode. Therefore, the following restriction applies to VioScrUnLock when coding in the DOS mode:

The status always indicates the unlock is successful (return code = 0).

Example Code

C Binding

<PRE> #define INCL_VIO

USHORT rc = VioScrUnLock(VioHandle);

HVIO VioHandle; /* Video handle */

USHORT rc; /* return code */ </PRE>

MASM Binding

<PRE> EXTRN VioScrUnLock:FAR INCL_VIO EQU 1

PUSH WORD VioHandle ;Video handle CALL VioScrUnLock

Returns WORD </PRE>

Note


en/docs/fapi/vioscrunlock.txt · Last modified: 2018/09/01 09:53 by prokushev