Enumerates hit test codes. 
Hit test codes are used to return hit information about a particular element and to specify what Chart elements should be hit tested. 
| Enumerator | 
|---|
| HIT_NONE | no element found  | 
| HIT_CHART_AREA | chart area  | 
| HIT_AXIS | one of displayed axes  | 
| HIT_AXIS_GRIDLINE | major or minor grid line  | 
| HIT_LEGEND | legend  | 
| HIT_LEGEND_ENTRY | legend entry  | 
| HIT_TITLE | chart title  | 
| HIT_AXIS_NAME | axis name  | 
| HIT_DIAGRAM | diagram area  | 
| HIT_DATA_POINT | data point  | 
| HIT_DATA_LABEL | data label  | 
| HIT_AXIS_SCROLL_BAR | scroll bar  | 
| HIT_AXIS_THUMB | thumb  | 
| HIT_AXIS_RESIZE_BAND | resize band  | 
| HIT_OBJECT | chart object  | 
| HIT_AXIS_SCALE_BREAK | chart scale break  | 
| HIT_DATA_TABLE | chart data table  | 
| HIT_DATA_AREA | chart series area  | 
| HIT_ALL_AXIS_ELEMENTS | all axis elements  | 
| HIT_ALL_ELEMENTS | all chart elements  |