IMap.ClipGeometry Property (ArcObjects .NET 10.6 SDK)
ArcObjects Library Reference (Carto)  

IMap.ClipGeometry Property

A shape that layers in the map are clipped to.

[Visual Basic .NET]
Public Property ClipGeometry As IGeometry
[C#]
public IGeometry ClipGeometry {get; set;}
[C++]
HRESULT get_ClipGeometry(
  IGeometry** ClipGeometry
);
[C++]
HRESULT put_ClipGeometry(
  IGeometry* ClipGeometry
);
[C++]

Parameters ClipGeometry [out, retval]
ClipGeometry is a parameter of type IGeometry** ClipGeometry [in]
ClipGeometry is a parameter of type IGeometry*

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.

Remarks

Use the ClipGeometry  property to shape the area the Map is drawn in.  For example, if you had a map of the United States that contained many layers, you could set the Map's ClipGeometry equal to the geometry of a particular state thereby telling the map to only draw the map data falling within the particular state's area.

The scripts below demonstrate this. 

In the ArcMap user interface, the same functionality is available on the map's data frame properties page.  Right-click on a map in the table of contents and select Properties.  Select the Data Frame tab and look at 'Clip to Shape'.  Under 'Specify a Shape', select 'Outline of Data Graphics'.  You can also specify a 'Custom Extent' or use the 'Outline of Features'.

The ClipBorder property puts a border around the cut out.

By default there is no clip geometry and no clip border.

See Also

IMap Interface | IMap.ClipBorder Property