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
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