c# - ToolStripMenuItem: Add arrow without submenu -

how can add menu item has arrow right if there submenu not show submenu?

background: managed c# application want add submenu created in unmanaged dll (using trackpopupmenu()).

in experiments, can show arrow when there items attached using "dropdownitems.add".

i tried use

toolstripmenuitem menu = new toolstripmenuitem(); m_menu.text = "item should have arrow w/o submenu"; m_menu.click += this.onmenudosomething; m_menu.dropdownitems.add(""); 

this still adds submenu. tried these combinations:

m_menu.dropdownitems[0].enabled = false; m_menu.dropdownitems[0].available = false; m_menu.dropdownitems[0].visible = false; 

but either submenu including arrow disappears or nothing @ all.

when drop down menu's handle created, assign nativewindow capture window messages , hide paint events. in fact, can hide events.

when want show drop down menu, release nativewindow's handle.

e.g.

    private class nw : nativewindow {         public nw(intptr handle) {             assignhandle(handle);         }          const int wm_paint = 0xf;         protected override void wndproc(ref message m) {             // can ignore messages             if (m.msg == wm_paint) {                 return;             }             base.wndproc(ref m);         }     }      [stathread]     static void main() {          menustrip menu = new menustrip();          nw nw = null; // declared outside prevent garbage collection         toolstripmenuitem item1 = new toolstripmenuitem("item1");         toolstripmenuitem subitem1 = new toolstripmenuitem("sub item1");         subitem1.dropdown.dropshadowenabled = false;         subitem1.dropdown.handlecreated += delegate {             nw = new nw(subitem1.dropdown.handle);         };          toolstripmenuitem mimakevisible = new toolstripmenuitem("make visible");         mimakevisible.click += delegate {             if (nw != null) {                 nw.releasehandle();                 nw = null;             }         };           toolstripmenuitem subitem2 = new toolstripmenuitem("sub item2");         item1.dropdownitems.add(subitem1);         item1.dropdownitems.add(mimakevisible);         subitem1.dropdownitems.add(subitem2);         menu.items.add(item1);           form f = new form();         f.controls.add(menu);         f.mainmenustrip = menu;         application.run(f);     }