VioScrollUp (FAPI)
This call scrolls the entire display buffer (or area specified within the display buffer) up.
Syntax
VioScrollUp (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 bottom 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.
Bindings
C
#define INCL_VIO
USHORT rc = VioScrollUp(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; /* Fill character */
HVIO VioHandle; /* Video handle */
USHORT rc; /* return code */
MASM
EXTRN VioScrollUp: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 ;Fill character PUSH WORD VioHandle ;Video handle CALL VioScrollUp Returns WORD