VioPrtSc

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

VioPrtSc

(VioHandle)

VioHandle (HVIO) - input

Reserved word of 0s.
rc (USHORT) - return
Return code descriptions are:
• 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.

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