HIGHCONTRAST

Overview

Group

Quick Info

Windows NT
Yes
Win95
Yes
Win32s
No
Import Library
-
Header File
winuser.h
Unicode
WinNT
Platform Notes
None

The HIGHCONTRAST structure contains information about the High Contrast Mode accessibility feature, which sets the appearance scheme of the user interface for maximum visibility for a visually-impaired user, and advises applications to comply with this appearance scheme.

typedef struct tagHIGHCONTRAST { // hc

UINT cbSize;

DWORD dwFlags;

LPTSTR lpszDefaultScheme;

} HIGHCONTRAST, FAR* LPHIGHCONTRAST;

Members
cbSize
Specifies the size, in bytes, of this structure.

dwFlags
Specifies a combination of the following values:

Value	Meaning
HCF_AVAILABLE	The High Contrast Mode is available.
HCF_CONFIRMHOTKEY	A confirmation dialog appears when the the High Contrast Mode is activated by using the hot key.
HCF_HIGHCONTRASTON	The High Contrast Mode is on.
HCF_HOTKEYACTIVE	The user can turn the High Contrast Mode on and off by simultaneously pressing the left ALT, left SHIFT, and PRINT SCREEN keys.
HCF_HOTKEYAVAILABLE	The hot key associated with the High Contrast Mode can be enabled. An application can retrieve this value, but cannot set it.
HCF_HOTKEYSOUND	A siren is played when the user turns the High Contrast Mode on or off by using the hot key.
HCF_INDICATOR	A visual indicator is displayed when the High Contrast Mode is on. This value is not currently used and is ignored.

lpszDefaultScheme
Points to a string that contains the name of the default color scheme.

Remarks
An application uses this structure when calling the SystemParametersInfo function with the SPI_GETHIGHCONTRAST or SPI_SETHIGHCONTRAST value. When using SPI_GETHIGHCONTRAST, an application must specify the cbSize member of the HIGHCONTRAST structure; the SystemParametersInfo function fills the remaining members. An application must specify all structure members when using the SPI_SETHIGHCONTRAST value.