调用IContextMenu :: QueryContextMenu,但IContextMenu :: InvokeCommand没有

时间:2011-10-10 12:14:01

标签: c++ windows com atl com-server

IContextMenu COM服务器的实现中,QueryContextMenu被调用(可以通过日志记录查看),但InvokeCommand没有。这是QueryContextMenu

HRESULT ContexMenuImp::QueryContextMenu(HMENU hmenu,UINT indexMenu,UINT idCmdFirst,
    UINT idCmdLast,UINT uFlags)
{
    if (uFlags & CMF_DEFAULTONLY) {
        // shouldn't handle this situation:
        LOG("IContextMenu::QueryContextMenu:    (...,CMF_DEFAULTONLY)");
        return MAKE_HRESULT(SEVERITY_SUCCESS,FACILITY_NULL,0);
    }else if (InsertMenuItem(hmenu,indexMenu,TRUE,&globals.menuItemInfo) == FALSE){
        // error occurred:
        LOG("IContextMenu::QueryContextMenu:    Error: %d",GetLastError());
        return MAKE_HRESULT(SEVERITY_SUCCESS,FACILITY_NULL,0);
    } else{
        // the desired situation: add item to the menu:
        LOG("IContextMenu::QueryContextMenu(hMenu,indexMenu:%u,idCmdFirst:%u,idCmdLast:%u,0x%x):    All set...",
            indexMenu,idCmdFirst,idCmdLast,uFlags);
        return MAKE_HRESULT(SEVERITY_SUCCESS,FACILITY_NULL,1/*handle only a single item*/);
    }
}

知道为什么吗?

1 个答案:

答案 0 :(得分:7)

您在插入菜单时忘记了idCmdFirst

globals.menuItemInfo.wID = idCmdFirst;
globals.menuItemInfo.fMask |= MIIM_ID;

(所以我说得对:你添加了错误ID的菜单项。)

请注意,由于每个上下文菜单可能具有不同的ID,因此不应使用全局。