dOPC Client Toolkit Help file
TdOPCGUI.UseTags Property
C++
__published: __property boolean UseTags;
C#
boolean UseTags;
Visual Basic
Property UseTags() As boolean

UseTags is True if the OPC item pointer should be stored in the Tag property of the assigned control, otherwise False.

procedure TForm1.Edit1Exit(Sender: TObject);
begin
  beep;
  if Edit1.Tag <> 0 then
    TdOPCItem(Edit1.Tag).WriteSync(Edit1.Text)
  else
    ShowMessage('Set property UseTags to true');
end;
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