[Feature = ] OBJECT.CreateCircularRegion( Type, Point, Distance, [Units] , [Resolution] , [Style] )
Part Description
OBJECT A FeatureFactory object.
Type Short: A CircleTypeConstants value: Specify miCircleTypeScreen(value:0)or miCircleTypeMap (1). (See below)
Point Point object: Represents the location to use as the center of the circle;
specified in the current numeric coordinate system.
Distance Double: The radius of the circle, in the units specified by the Units argument.
Units Variant: A MapUnitConstants value, such as miUnitMile (0), that identifies the unit of measure for the Distance argument. Optional;
if omitted, the MapUnit property controls the Units.
Resolution Variant: A positive integer indicating the number of nodes to use in creating the circle;
maximum number is 32,763. Optional;
if omitted, the DefaultConversionResolution property controls resolution.Specifying a large resolution produces a smoother looking region, but it takes longer to generate, and the resulting object requires more storage space.
Style Variant: A Style object that defines the appearance of the feature. Optional;
if omitted, no style is set.
我就是不明白这些参数的用法，哪位大侠给段示例程序
