VioScrollDown: Difference between revisions
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:Address of the character-attribute pair (2 or 4 bytes) used as a fill character on inserted lines. | :Address of the character-attribute pair (2 or 4 bytes) used as a fill character on inserted lines. | ||
; VioHandle (HVIO) - input : Vio presentation-space handle. | ; VioHandle (HVIO) - input : Vio presentation-space handle. | ||
:This must be 0, unless the caller is a Presentation Manager application; in this case, it must be the value returned by VioCreatePS. | :This must be 0, unless the caller is a Presentation Manager application; in this case, it must be the value returned by [[VioCreatePS]]. | ||
==Return Code== | ==Return Code== | ||
;rc (APIRET) - returns | |||
VioScrollDown returns one of the following values: | VioScrollDown returns one of the following values: | ||
:{| | |||
|0||NO_ERROR | |||
|- | |||
|355||ERROR_VIO_MODE | |||
|- | |||
|358||ERROR_VIO_ROW | |||
|- | |||
|359||ERROR_VIO_COL | |||
|- | |||
|421||ERROR_VIO_INVALID_PARMS | |||
|- | |||
|436||ERROR_VIO_INVALID_HANDLE | |||
|} | |||
==Remarks== | ==Remarks== | ||
Latest revision as of 22:03, 7 January 2024
Scrolls the entire display buffer (or area specified within the display buffer) down.
There had been reports on the community that this function was not implemented on the OS/2 4.5 Toolkit. [1]
Syntax
VioScrollDown (TopRow, LeftCol, BotRow, RightCol, Lines, Cell, VioHandle)
Parameters
- TopRow (ULONG) - input
- Top row to be scrolled.
- LeftCol (ULONG) - input
- Left column to be scrolled.
- BotRow (ULONG) - input
- Bottom row to be scrolled.
- RightCol (ULONG) - input
- Right column to be scrolled.
- Lines (ULONG) - input
- Number of lines.
- 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
- Cell to be written.
- Address of the character-attribute pair (2 or 4 bytes) used as a fill character on inserted lines.
- VioHandle (HVIO) - input
- Vio presentation-space handle.
- This must be 0, unless the caller is a Presentation Manager application; in this case, it must be the value returned by VioCreatePS.
Return Code
- rc (APIRET) - returns
VioScrollDown returns one of the following values:
0 NO_ERROR 355 ERROR_VIO_MODE 358 ERROR_VIO_ROW 359 ERROR_VIO_COL 421 ERROR_VIO_INVALID_PARMS 436 ERROR_VIO_INVALID_HANDLE
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 are greater than the screen lines, the entire screen is filled with the character-attribute pair defined by Cell.