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| ArcObjects Help for .NET developers > ArcObjects namespaces > Carto > ESRI.ArcGIS.Carto > Interfaces > IE > IExpression Interface > IExpression.IsValid Method (ArcObjects .NET 10.5 SDK) | 
Check the validity of the expression.
[Visual Basic .NET] Public Function IsValid ( _ ByVal pTable As ITable _ ) As Boolean
[C#] public bool IsValid ( ITable pTable );
[C++]
HRESULT IsValid(
  ITable* pTable,
  VARIANT_BOOL* Valid
);
[C++]
Parameters pTable [in]
pTable is a parameter of type ITable Valid [out, retval] Valid is a parameter of type VARIANT_BOOL