This method is the analogue of the standard function from the Dialogs.pas module. All the parameters are according to the standard, you can read the detailed information in the Borland's documentation.

TTeMessage

function MessageDlgPos(const Msg: WideString; DlgType: TMsgDlgType; Buttons: TMsgDlgButtons; HelpCtx: Integer; X: Integer; Y: Integer): Integer;

TTeMessage