Question

I implemented an IContextMenu3 interface and I am trying to capture keystrokes for my own custom accelerator. The problem is that if i hover over my submenu in the root menu I dont get any WM_MENUCHAR messages whereas if I hover over a submenu that is inside one of my submenu’s then I do.

I know that the WM_INITMENUPOPUP message only gets sent if there is a child. The WM_MENUCHARhas the caveat that no accelerators are bound to the key. I know this caveat to be held since when I press a key, I get the distinctive ‘no-accelerator’ beep.

Is there another caveat that I am not aware of?

This is the smallest code I can get that reproduces the problem:

HRESULT CFolderViewImplContextMenu::QueryContextMenu(HMENU hmenu, UINT uMenuIndex, UINT idCmdFirst, UINT idCmdLast, UINT /* uFlags */)
{
UINT uID = idCmdFirst;
HMENU hSubmenu = CreatePopupMenu();

MENUITEMINFO mii = { 0 };
mii.cbSize = sizeof(MENUITEMINFO);
mii.fMask = MIIM_SUBMENU | MIIM_ID | MIIM_STRING;
mii.dwTypeData = str_toWchar("test");
mii.wID = uID++;
mii.hSubMenu = hSubmenu;    

InsertMenuItem ( hmenu, 0, TRUE, &mii );
InsertMenu ( hSubmenu, 0, MF_BYPOSITION, uID++, L"&Notepad" );
InsertMenu ( hSubmenu, 1, MF_BYPOSITION , uID++, L"&Internet Explorer" );

HMENU hSubmenu2 = CreatePopupMenu();
MENUITEMINFO mii2 = {0};
mii2.cbSize = sizeof(MENUITEMINFO);

mii2.fMask  = MIIM_ID | MIIM_TYPE | MIIM_SUBMENU;
mii2.fType  = MFT_OWNERDRAW;
mii2.wID    = uID++;
mii2.hSubMenu = hSubmenu2;
InsertMenuItem ( hSubmenu, 0, TRUE, &mii2 );

InsertMenuA ( hSubmenu2, 0, MF_BYPOSITION, uID++, "");

return MAKE_HRESULT ( SEVERITY_SUCCESS, FACILITY_NULL, uID - idCmdFirst );
}

Answer 1

The problem is the first item in the submenu. If the first item in the submenu is also a submenu, then the message doesnt get passed. So I instead put a normal item there.