The AREATYPEENUM enumeration provides information about the shape of area to capture.
typedef enum tagAREATYPEENUM
{
CAPTURE_AREA_TRIANGLE=1,
CAPTURE_AREA_RECT,
CAPTURE_AREA_ROUNDRECT,
CAPTURE_AREA_ELLIPSE,
CAPTURE_AREA_POLYGON,
CAPTURE_AREA_FREEHAND
} AREATYPEENUM;
Triangle.
Rectangle.
Rounded Rectangle.
Ellipse.
Polygon (each click defines point).
Freehand (click and drag).