subcalls.hlp (Topic list)
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The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.
Vio functions (1.2)
Function Groups  Overview  Changes              Up Next Previous
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VioAssociate          Associates an AVIO pres. space with a device context
VioCreateLogFont      Creates a logical font
VioCreatePS           Creates an AVIO presentation space
VioDeleteSetId        Deletes a logical font
VioDeRegister         Removes a registered Vio subsystem
VioDestroyPS          Destroys an AVIO presentation space
VioEndPopUp           Ends a VIO pop-up screen
VioGetAnsi            Retrieves the ANSI flag
VioGetBuf             Retrieves the address of the logical video buffer
VioGetConfig          Retrieves the video-display configuration
VioGetCp              Retrieves a video code-page identifier
VioGetCurPos          Retrieves the position of the cursor
VioGetCurType         Retrieves the cursor type
VioGetDeviceCellSize  Retrieves the current device cell size
VioGetFont            Retrieves a video font
VioGetMode            Retrieves the screen mode
VioGetOrg             Retrieves the origin of a presentation space
VioGetPhysBuf         Retrieves the address of the physical video buffer
VioGetState           Retrieves the video state
VioModeUndo           Cancels a request for notification of mode change
VioModeWait           Waits for a change of the video mode
VioPopUp              Opens a VIO pop-up screen
VioPrtSc              Prints the screen (system use only)
VioPrtScToggle        Toggles screen printing (system use only)
VioQueryFonts         Retrieves information about fonts
VioQuerySetIds        Retrieves all loaded fonts
VioReadCellStr        Reads a character-attribute (cell) string
VioReadCharStr        Reads a character string
VioRegister           Registers an alternate Vio subsystem
VioSavRedrawUndo      Cancels notification of screen switches
VioSavRedrawWait      Waits until a screen switch
VioScrLock            Locks the screen
VioScrollDn           Scrolls the screen downward
VioScrollLf           Scrolls the screen left
VioScrollRt           Scrolls the screen right
VioScrollUp           Scrolls the screen upward
VioScrUnLock          Unlocks the screen
VioSetAnsi            Enables or disables ANSI escape sequences
VioSetCp              Sets a video code page
VioSetCurPos          Sets the position of the cursor
VioSetCurType         Sets the cursor type
VioSetDeviceCellSize  Sets the device cell size
VioSetFont            Sets a video font
VioSetMode            Sets the display mode
VioSetOrg             Sets the origin for a presentation space
VioSetState           Sets the video state
VioShowBuf            Displays the logical video buffer
VioShowPS             Updates the display
VioWrtCellStr         Writes a character-attribute (cell) string
VioWrtCharStr         Writes a character string
VioWrtCharStrAtt      Writes a character string with an attribute
VioWrtNAttr           Writes an attribute n times
VioWrtNCell           Writes a character-attribute (cell) n times
VioWrtNChar           Writes a character n times
VioWrtTTY             Writes a char string (current cursor position)