AcMapIEInputLayer::UseUniqueKeyField Method

Determines whether a unique value is created for each incoming entity. This setting is ignored unless an existing or new object data table already has been set with SetDataMapping(). The key column has type integer. In the AutoCAD Map user interface, this setting corresponds to the Add Unique Key Field check box in the Attribute Data dialog box.

virtual bool UseUniqueKeyField(
    const ACHAR*& pszKeyFieldName
) const = 0;

Returns true if unique values are created; otherwise, returns false. If true, pszKeyFieldName column contains a non-empty string; if false, pszKeyFieldName contains an empty string.