VioScrollDn

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

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

Parameters

 * 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.

Return Code

 * 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

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.

This function is defined in header file bsesub.h.
 * OS/2 Developer's Toolkit 4.5

C

 * 1) 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 */ 

MASM
 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 

Related Functions

 * VioScrollUp