VioPrtSc

Description

This call is issued by the Session Manager when the operator presses PrtSc.

Syntax

 VioPrtSc

    (VioHandle)

Parameters

VioHandle (HVIO) - input

Reserved word of 0s.

Return Code

rc (USHORT) - return

Return code descriptions are:

• 0 NO_ERROR
• 355 ERROR_VIO_MODE
• 402 ERROR_VIO_SMG_ONLY
• 436 ERROR_VIO_INVALID_HANDLE
• 465 ERROR_VIO_DETACHED

Remarks

VioPrtSc supports text modes 0 through 3, and 7. An Alternate Video Subsystem may want to register a replacement for VioPrtSc. An advanced video subsystem could set a graphics mode while the mode known to the base video subsystem PrtSc routine is text. Then, if the operator presses PrtSc, the printer output is unpredictable. VioPrtSc is reserved for use by the session manager. Application programs may not issue VioPrtSc.

Three beeps are generated if a hard error is detected while writing to the printer.

Example Code

C Binding

#define INCL_VIO

USHORT  rc = VioPrtSc(VioHandle);

HVIO             VioHandle;     /* Vio handle */

USHORT           rc;            /* return code */

MASM Binding

EXTRN  VioPrtSc:FAR
INCL_VIO            EQU 1

PUSH   WORD    VioHandle     ;Vio handle
CALL   VioPrtSc

Returns WORD