The color value SFTMASK_NOCOLOR ((COLORREF)-1) is used for color fields of the SFTMASK_CONTROL structure to select the applicable default color instead of an explicit RGB value.
#define SFTMASK_NOCOLOR ((COLORREF)-1)
Color fields also accept explicit RGB values and system color values (COLOR_* | 0x80000000L), which resolve to the current system colors, including the user's high contrast palette when high contrast is active.
See Also Display Attributes | SFTMASK_CONTROL
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