en:docs:fapi:vioprtsc

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

2021/09/17 06:47 · prokushev
2021/08/20 05:18 · prokushev

VioPrtSc

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.

Bindings

C

#define INCL_VIO
 
USHORT  rc = VioPrtSc(VioHandle);
HVIO    VioHandle;     /* Vio handle */
 
USHORT  rc;            /* return code */

MASM

EXTRN  VioPrtSc:FAR
INCL_VIO            EQU 1
 
PUSH   WORD    VioHandle     ;Vio handle
CALL   VioPrtSc
 
Returns WORD

Text based on http://www.edm2.com/index.php/VioPrtSc


en/docs/fapi/vioprtsc.txt · Last modified: 2021/09/28 03:30 by prokushev