Specifies modes for IG_IP_area_info_get_ex function.
Values:
IG_DIB_AREA_INFO_MIN | The information requested is a minimum pixel value on the area. |
IG_DIB_AREA_INFO_MAX | The information requested is a maximum pixel value on the area. |
IG_DIB_AREA_INFO_AVE | The information requested is an average pixel value on the area. |
IG_DIB_AREA_INFO_CENTER | The information requested is a value of the central pixel in the area. |