Bde.DBTables.TBDEDataSet.ConstraintCallBack
| [–] Properties | |
|---|---|
| Type: function | |
| Visibility: public | |
| Source: Bde.DBTables.pas Bde.DBTables.hpp
| |
| Unit: Bde.DBTables | |
| Parent: TBDEDataSet | |
Delphi
function ConstraintCallBack(Req: DsInfoReq; var ADataSources: DataSources): DBIResult; stdcall;
C++
Bde::DBIResult __stdcall ConstraintCallBack(Bde::DsInfoReq Req, Bde::DataSources &ADataSources);
Description
Specifies the callback function that allows the dataset to communicate with the BDE constraint layer.
Use the address of ConstraintCallBack as a parameter when making direct API calls to Borland Database Engine (BDE) functions that require a callback to provide information about the constraints on the dataset or its fields.