RAD Studio VCL Reference
TCustomConnection Class

TCustomConnection is the base class for components that connect datasets to a remote source of data.

TCustomConnection = class(TComponent);
class TCustomConnection : public TComponent;

Use TCustomConnection as a base class for components that represent a remote source of the data contained in a dataset. This source can be a remote database server, the middle tier of a multi-tiered database application, an interface such as the one used by ActiveX Data Objects (ADO), or any other driver that provides the information represented in a dataset. TCustomConnection introduces: 

Methods for connecting to and disconnecting from the source of data. 

Login support for providing a user name and password when establishing a connection. 

Properties for keeping track of the datasets that use the connection component. 

Do not create instances of TCustomConnection. To add a component that represents the connection to a source of data, use a TCustomConnection descendant such as TDatabase, TADOConnection, TSQLConnection, or one of the DataSnap connection components such as TDCOMConnection TSQLConnection or TSOAPConnection. 


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