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.
See Also