Hola.
Código PHP:
...
{
DBGrid1->ReadOnly = false;
DBGrid1->Options = DBGrid1->Options +
TDBGridOptions() >> dgRowSelect << dgEditing << dgMultiSelect ;
// O también:
// DBGrid1->Options = TDBGridOptions(DBGrid1->Options) >> dgRowSelect
// << dgEditing << dgMultiSelect ;
}
Saludos