c++ - Virtual Key combination -

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this question has answer here:

i'm looking c++ virtual key combination, i'm looking simple key combination action. i'm trying shift+g work. i've tried know , it's given me different results nothing i'm trying do.

if (vk_shift & 0x47) // shift+g test {     if(::getkeystate(0x47)<0);           {         cbaseitem* piteminfo = g_pitemtablehash->getdata(             g_pmainplayer->m_pinv_guardian[0].getid());          if (guardian_item_type_adult == piteminfo->baseitem_guardian.btype)         {             if(cuserinterface::getinstance()->m_bguardian==false)             {                                // on //                 ctds_dungeon_callgardian callguardinan;                 callguardinan.bzipcode = 0;                 g_pnet->sendmsg( (char*)&callguardinan, callguardinan.getpacketsize(),                     server_index_zone);             }         }     } }

all matters first line, 1 know how can fix key combination shift+g works?

the biggest problem in code ; @ end of 

 if(::getkeystate(0x47)<0);      // !!!!!

the ; causes following indented inner if-block executed in case !

here similar simplified code works well: 

    while(true) {         if(::getkeystate(vk_shift) & 0x8000)  // shift pressed ?           {             if(::getkeystate(0x47) & 0x8000)  // if g pressed ?               {                 std::cout << "shift g pressed" << std::endl;                 break;             }             else std::cout << "shift..." << std::endl;         }     } }

additional infos:

the expression (vk_shift & 0x47) constant independent of input. vk_shift 0x10 , 0x10 & 0x47 yields 0. outer if-block gets never executed.


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