VioPrtScToggle

Bindings:  C, MASM 

This call is called by the Session Manager when the operator presses Ctrl 
and PrtSc. 

 VioPrtScToggle   (VioHandle) 
 

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

 rc (USHORT) - return 
    Return code descriptions are: 

    0         NO_ERROR 
    355       ERROR_VIO_MODE 
    402       ERROR_VIO_SMG_ONLY 
    430       ERROR_VIO_ILLEGAL_DURING_POPUP 
    436       ERROR_VIO_INVALID_HANDLE 
    465       ERROR_VIO_DETACHED 
 
 Remarks 

 VioPrtScToggle toggles the Ctrl and PrtSc state of the foreground 
 session.  When the Ctrl and PrtSc state is on, all VioWrtTTY calls from 
 that session are echoed to the print device. 

 VioPrtScToggle can only be called by the session manager. If an 
 application issues this call, it receives an error code. 

 Three beeps are generated if a hard error is detected while writing to 
 the printer.  When Ctrl and PrtSc is turned off, the operator may have to 
 press the Enter key to cause output spooled while Ctrl and PrtSc was 
 active to be printed. This is because the spool files are closed when the 
 next VioWrtTTY is executed in the session, such as writing the prompt in 
 response to the Enter key.