VioScrollDn

This call scrolls the entire display buffer (or area specified within the display buffer) down.

VioScrollDn

(TopRow, LeftCol, BotRow, RightCol, Lines, Cell, VioHandle)

TopRow (USHORT) - input

Top row to be scrolled.
LeftCol (USHORT) - input
Left column to be scrolled.
BotRow (USHORT) - input
Bottom row to be scrolled.
RightCol (USHORT) - input
Right column to be scrolled.
Lines (USHORT) - input
Number of lines to be inserted at the top of the screen area being scrolled. If 0 is specified, no lines are scrolled.
Cell (PBYTE) - input
Address of the character-attribute(s) pair (2 or 4 bytes) used as a fill character on inserted lines.
VioHandle (HVIO) - input
This must be zero unless the caller is a Presentation Manager application, in which case it must be the value returned by VioGetPs.
rc (USHORT) - return
Return code descriptions are:
• NO_ERROR 355
  ERROR_VIO_MODE
  358
  ERROR_VIO_ROW
  359
  ERROR_VIO_COL
  436
  ERROR_VIO_INVALID_HANDLE
  465
  ERROR_VIO_DETACHED
  Remarks

  TopRow = 0 and LeftCol = 0 identifies the top left corner of the screen.

  If a value greater than the maximum value is specified for TopRow, LeftCol, BotRow, RightCol, or Lines, the maximum value for that parameter is used.

  If TopRow and LeftCol = 0 and if BotRow, RightCol, and Lines = 65535 (or -1 in assembler language), the entire screen is filled with the character-attribute pair defined by Cell.

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