Function ModifyDefinition( _
   ByVal Data As System.Object, _
   ByVal TopDoc As System.Object, _
   ByVal Component As System.Object _
) As System.Boolean

Dim instance As IFeature
Dim Data As System.Object
Dim TopDoc As System.Object
Dim Component As System.Object
Dim value As System.Boolean
 
value = instance.ModifyDefinition(Data, TopDoc, Component)

System.bool ModifyDefinition( 
   System.object Data,
   System.object TopDoc,
   System.object Component
)

System.bool ModifyDefinition( 
&   System.Object^ Data,
&   System.Object^ TopDoc,
&   System.Object^ Component
) 

Parameters

Data

Feature data object

TopDoc

Top-level document (see Remarks)

Component

Component for the feature (see Remarks)

Return Value

True if the feature definition modified successfully, false if not

If this method returns:

• False, you may have specified invalid properties in the feature data modifier object. The feature definition was not modified, so the feature may have rolled back to its previous state.
• True, the feature was updated using the feature data modifier object provided. This method will return true even if the feature data modifier object does not include any changed properties or references; some feature data modifier objects reject invalid changes before this method is called. For some feature modifications, this method applies the new properties, returns true, but results in a new rebuild error on the feature.

In either case, this method may leave the feature in an unpredictable state due to errors. After calling this method, call IFeature::GetErrorCode2 to ascertain whether the feature has rebuild errors. If so, try again with valid feature data. To correct rebuild errors, call IModelDoc2::ForceRebuild3. You can also move the rollback bar in the FeatureManager design tree to before and after the feature to correct its state.

You should carefully read specific feature data interface documentation to learn how to correctly specify feature data properties and how this method works with specific features.

When you modify a feature in an assembly, this method leaves the assembly in Editing Part mode. You can switch back to editing the assembly by calling IAssemblyDoc::EditAssembly.