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:

• 0 NO_ERROR
• 355 ERROR_VIO_MODE
• 358 ERROR_VIO_ROW
• 359 ERROR_VIO_COL
• 436 ERROR_VIO_INVALID_HANDLE
• 465 ERROR_VIO_DETACHED

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.

#define INCL_VIO
 
USHORT  rc = VioScrollDn(TopRow, LeftCol, BotRow, RightCol, Lines, Cell,
                             VioHandle);
 
USHORT           TopRow;        /* Top row */
USHORT           LeftCol;       /* Left column */
USHORT           BotRow;        /* Bottom row */
USHORT           RightCol;      /* Right column */
USHORT           Lines;         /* Number of lines */
PBYTE            Cell;          /* Cell to be written */
HVIO             VioHandle;     /* Video handle */
 
USHORT           rc;            /* return code */

EXTRN  VioScrollDn:FAR
INCL_VIO            EQU 1
 
PUSH   WORD    TopRow        ;Top row
PUSH   WORD    LeftCol       ;Left column
PUSH   WORD    BotRow        ;Bottom row
PUSH   WORD    RightCol      ;Right column
PUSH   WORD    Lines         ;Number of lines
PUSH@  OTHER   Cell          ;Cell to be written
PUSH   WORD    VioHandle     ;Video handle
CALL   VioScrollDn
 
Returns WORD

Text based on http://www.edm2.com/index.php/VioScrollDn