Function Reference 4-107
vidScroll
Description
Does either of the following to the current display page:
♦ Sets the display to ASCII space characters in either normal
or reverse video.
♦ Scrolls the specified window up or down by a specified
number of lines. The application loses any text that scrolls
beyond the window’s top or bottom. New lines contain ASCII
blank characters with the specified attribute.
The specified window is the entire display or part of it.
Syntax
void far vidScroll(short sTop,
short sLeft,
short sBottom,
short sRight,
short sNumber,
unsigned char uchAttr);
Parameters
sTop
The window’s top row. For 4-row printers, values are
0-
3
. For 8-row printers, values are
0-7
.
sLeft
The window’s left-most column. Values are
0-19
.
sBottom
The window’s bottom row. For 4-row printers, values
are
0-3
. For 8-row printers, values are
0-7
.
sRight
The window’s right-most column. Values are
0-19
.
sNumber
The action. If you enter 0, the function clears the entire
display. If you enter a positive number, the window
scrolls up that many lines. If you enter a negative
number, the window scrolls down that many lines.
uchAttr
Attribute for the cleared area or new lines when
scrolling. Values are:
0x07
Normal video
0x70
Reverse video
