c++ - MFC button onclick handler -

i've 2 mfc buttons want hide when 3d stl file being loaded , show buttons again when stl loading complete. prevent user re-loading model when loading taking place.

the snippet of code below

        { // change control state when model loads             ((cbutton *)this->getdlgitem(idc_reload_stock_button))->showwindow(sw_hide);             ((cbutton *)this->getdlgitem(idok))->showwindow(sw_hide);             updatewindow();         }          // process takes few seconds load file in memory         customstockmodel.loadfile(pathname.getbuffer(pathname.getlength()));          {             // change control state when model has loaded             ((cbutton *)this->getdlgitem(idc_reload_stock_button))->showwindow(sw_show);             ((cbutton *)this->getdlgitem(idok))->showwindow(sw_show);             updatewindow();          } 

the buttons hidden , reappear expect, when click button area while it's hidden, onclick handler gets called when button control reappears on screen. seems click message queued , mfc calls handler once buttons activated. doing wrong here?

ideally should read file in thread - allow application refresh , process messages. if unsure (multi-threading is hard), can call regularly following function in lenghty function clear message loops.

bool yourclass::doevents() {     msg msg;     while (::peekmessage(&msg, null, 0, 0, pm_remove))     {         if (msg.message == wm_quit)         {             return false;         }         if (!afxgetapp()->pretranslatemessage(&msg))         {             ::translatemessage(&msg);             ::dispatchmessage(&msg);         }     }     return true; } 

it work "proper programmers" scream when see this! luck