Background of characters is defined by
the rectangle prclRect. The rectangle is to be shaded (with background color
and overpaint) before drawing.
CHS_VECTOR
Increment
vector supplied (pAdx). If 0, pAdx is ignored.
CHS_LEAVEPOS
Leave current position at the start of the string.
CHS_CLIP
Clip string to
rectangle.
CHS_START_XY
Start
position of the string. When set, the handling routine must draw the string
from the position indicated by pptlStart. If this flag is not set, the current
position is used.
CHS_ATTR_INFO
Attributes
to be used. When this flag is set, pAttrs indicates the foreground and background
colors. Current attributes are unchanged. If the flag is not set, the string
is drawn using the current character attributes. See Character
Attributes.