ScrollConsoleScreenBuffer - Win32 Programmer's Reference

Win32 Programmer's Reference

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Windows NT
Yes
Win95
Yes
Win32s
No
Import Library
kernel32.lib
Header File
wincon.h
Unicode
WinNT
Platform Notes
None

ScrollConsoleScreenBuffer

The ScrollConsoleScreenBuffer function moves a block of data in a screen buffer. The effects of the move can be limited by specifying a clipping rectangle, so the contents of the screen buffer outside the clipping rectangle are unchanged.

BOOL ScrollConsoleScreenBuffer(

HANDLE hConsoleOutput,	// handle of a console screen buffer
CONST SMALL_RECT *lpScrollRectangle,	// address of screen buffer rect. to move
CONST SMALL_RECT *lpClipRectangle,	// address of affected screen buffer rect.
COORD dwDestinationOrigin,	// new location of screen buffer rect.
CONST CHAR_INFO *lpFill	// address of fill character and color
);

Parameters
hConsoleOutput

Identifies a console screen buffer. The handle must have GENERIC_WRITE access.

lpScrollRectangle

Points to a SMALL_RECT structure whose members specify the upper-left and lower-right coordinates of the screen buffer rectangle to be moved.

lpClipRectangle

Points to a SMALL_RECT structure whose members specify the upper-left and lower-right coordinates of the screen buffer rectangle that is affected by the scrolling. This pointer can be NULL.

dwDestinationOrigin

Specifies the upper-left corner of the new location of the lpScrollRectangle contents.

lpFill

Points to a CHAR_INFO structure that specifies the character and color attributes to be used in filling the cells within the intersection of lpScrollRectangle and lpClipRectangle that were left empty as a result of the move.

Return Values
If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero. To get extended error information, call GetLastError.

Remarks
ScrollConsoleScreenBuffer copies the contents of a rectangular region of a screen buffer, specified by the lpScrollRectangle parameter, to another area of the screen buffer. The target rectangle has the same dimensions as the lpScrollRectangle rectangle with its upper-left corner at the coordinates specified by the dwDestinationOrigin parameter. Those parts of lpScrollRectangle that do not overlap with the target rectangle are filled in with the character and color attributes specified by the lpFill parameter.

The clipping rectangle applies to changes made in both the lpScrollRectangle rectangle and the target rectangle. For example, if the clipping rectangle does not include a region that would have been filled by the contents of lpFill, the original contents of the region are left unchanged.

If the scroll or target regions extend beyond the dimensions of the screen buffer, they are clipped. For example, if lpScrollRectangle is the region contained by (0,0) and (19,19) and dwDestinationOrigin is (10,15), the target rectangle is the region contained by (10,15) and (29,34). However, if the screen buffer is 50 characters wide and 30 characters high, the target rectangle is clipped to (10,15) and (29,29). Changes to the screen buffer are also clipped according to lpClipRectangle, if the parameter specifies a SMALL_RECT structure. If the clipping rectangle is specified as (0,0) and (49,19), only the changes that occur in that region of the screen buffer are made.

Windows NT: This function uses either Unicode characters or 8-bit characters from the console's current codepage. The console's codepage defaults initially to the system's OEM codepage. To change the console's codepage, use the SetConsoleCP or SetConsoleOutputCP functions, or use the chcp or mode con cp select= commands.

See Also
CHAR_INFO, SetConsoleCP, SetConsoleOutputCP, SetConsoleWindowInfo, SMALL_RECT

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