visual studio - How to create a drop down menu in MFC for WINCE -

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i have following code in win32 app shows drop down menu on clicking button. however, not work in wince menuinfo not defined. there way can around this? need view drop down menu on clicking button, , name appearing on button changes depending on option on menu.

void ctestdlg::onbnclickedbtnmenu()   {       if( null == m_popupmenu.m_hmenu )         {        m_popupmenu.setmenudimension( 120 );          m_popupmenu.createpopupmenu();         m_popupmenu.appendmenu( mf_string | mf_enabled | mf_ownerdraw, 697, _t("a") );         m_popupmenu.appendmenu( mf_string | mf_enabled | mf_ownerdraw, 697, _t("b") );         m_popupmenu.appendmenu( mf_string | mf_enabled | mf_ownerdraw, 697, _t("c") );         m_popupmenu.appendmenu( mf_string | mf_enabled | mf_ownerdraw, 697, _t("d") );          menuinfo menuinfo;         memset( &menuinfo, 0, sizeof(menuinfo) );         menuinfo.cbsize = sizeof(menuinfo);         menuinfo.fmask = mim_style;         menuinfo.dwstyle = mns_notifybypos;          m_popupmenu.setmenuinfo( &menuinfo ); }


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