Author: Jonas Bilinkevicius

I want to write a TMenu component where all items and sub menus are right justified.

Answer:

You can change the item's justification, if you add the MFT_RIGHTJUSTIFY constant 
to the item's type (fType member of the TMenuItemInfo structure). You can do it in 
the main menu's OnChange event handler. Here's an example:
1   
2   procedure TForm1.MainMenu1Change(Sender: TObject; Source: TMenuItem; Rebuild:
3     Boolean);
4   var
5     XHandle: HMENU;
6     XMenuItemInfo: TMenuItemInfo;
7     XBuffer: array[0..79] of Char;
8   begin
9     XHandle := TMainMenu(Sender).Handle;
10    XMenuItemInfo.cbSize := 44;
11    XMenuItemInfo.fMask := MIIM_TYPE;
12    XMenuItemInfo.dwTypeData := XBuffer;
13    XMenuItemInfo.cch := SizeOf(XBuffer);
14    if GetMenuItemInfo(XHandle, 0, true, XMenuItemInfo) then
15    begin
16      XMenuItemInfo.fType := XMenuItemInfo.fType or MFT_RIGHTORDER or 
17  MFT_RIGHTJUSTIFY;
18      XMenuItemInfo.fMask := MIIM_TYPE;
19      SetMenuItemInfo(XHandle, 0, true, XMenuItemInfo);
20    end;
21  end;