RAD Studio VCL Reference
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TDBLookupControl.DataLink Property

Helps the lookup control manage its link to the data source and respond to data events.

Pascal
property DataLink: TDataSourceLink;
C++
__property TDataSourceLink DataLink;

DataLink is used internally to access the TDataSourceLink that coordinates communication between the dataset in which you find the field that this control represents, the data source for that dataset (identified by the DataSource property), and the lookup control. 

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