Corona Beer, Need more Delphi 7 help

[Madboy]

I must be annoying you by now, all other members think so

Anyway, here are a few more questions, if you dont mind helping:

How do i limit a Textbox to Numbers only?

How do i limit a Textbox to Words only?

How do i limit a Textbox to Symbols only?

How do i create a MRU list in a standard Delphi menu?

Have you seen in Wordpad, if you move your mouse over the File > New menus etc it shows a hint in the statusbar. How would i go about doing the same thing?

How do you change the caption in a MessageDlg?

And whats wrong with this? It doesnt align my text:

procedure TfrmMain.mnuFormatAlignLeftClick(Sender: TObject);
begin
mnuFormatAlignCenter.Checked:= False;
mnuFormatAlignRight.Checked:= False;
txtMain.Alignment:= taLeftJustify
end;

procedure TfrmMain.mnuFormatAlignCenterClick(Sender: TObject);
begin
mnuFormatAlignLeft.Checked:= False;
mnuFormatAlignRight.Checked:= False;
txtMain.Alignment:= taCenter

end;

procedure TfrmMain.mnuFormatAlignRightClick(Sender: TObject);
begin
mnuFormatAlignLeft.Checked:= False;
mnuFormatAlignCenter.Checked:= False;
txtMain.Alignment:= taRightJustify

end;

THANK YOU MATE!