End

The output of this call is:

ClientDataSetl.Fie1dDefs[0].ToString:

CustNo - This is the first column [TMyFieldDef]

The second customization is based on the definition of a custom string field type derived from the AnsiString type: type

TMyStringField = class (TStringField) protected function GetAsString: string; override; end;

function TMyStringField.GetAsString: string; begi n

Result := inherited GetAsString + ' is not Unicode'; end;

This class makes a rather odd customization, adding a fixed string to the output of each AnsiString field. The simplest way to connect the custom field class to all fields of a given type (whose internal format must be compatible) is to use the DefaultFieldClasses global array:

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