ArcGIS Developer Help

IEnvelopeGEN.Expand Method

Moves the X and Y coordinates of the sides toward or away from each other.

[Visual Basic .NET]
Public Sub Expand ( _
    ByVal dx As Double, _
    ByVal dy As Double, _
    ByVal asRatio As Boolean _
)

[C#]
public void Expand (
    double dx,
    double dy,
    bool asRatio
);

[C++]
HRESULT Expand(
  double dx,
  double dy,
  VARIANT_BOOL asRatio
);

[C++]
Parameters
dx 

  dx is a parameter of type double
dy 

  dy is a parameter of type double
asRatio 

  asRatio is a parameter of type bool

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

refer to the Expand method of IEnvelope