Modifying menu items

问题

I have a popup menu I would like to modify before it is being displayed. I can actually modify the string of a menu item fine. The problem is, that this renders it useless as nothing happens when the modified menu item is clicked on.

CMenu* pPopup = menu.GetSubMenu(0);
ASSERT(pPopup != NULL);

CWnd* pWndPopupOwner = this;
while(pWndPopupOwner->GetStyle() & WS_CHILD)
    pWndPopupOwner = pWndPopupOwner->GetParent();

// modify string
pPopup->ModifyMenu(1, MF_BYPOSITION | MF_STRING, NULL, oss.str().c_str());

pPopup->TrackPopupMenu(TPM_LEFTALIGN | TPM_RIGHTBUTTON, point.x, point.y, pWndPopupOwner);

回答1:

Your call to ModifyMenu is setting the menu's ID to zero (via the third argument). You need to keep that ID the same.

If that's awkward, the SetMenuItemInfo API lets you change the string without changing the ID.

来源：https://stackoverflow.com/questions/14796341/modifying-menu-items