c++ - WinAPI window doesn't appear -

and can't figure out why. code:

#include <windows.h> #include <commctrl.h> #include <cstdio> #include <stdarg.h> #include <string> #include <cmath> #include <vector> #include "resources.hpp"  using std::string; using std::vector;  struct undostruct{     /* add later */};  char buffer[2048]; hwnd statusbar; hinstance hinst; vector<undostruct> undo;  void show_error(const char* format,...){     va_list args;     va_start(args,format);     vsprintf(buffer,format,args);     va_end(args);     messagebox(null,buffer,"error",mb_ok);}  hwnd create_tooltip(hwnd parent,char* tip,unsigned uid,unsigned extraflags=0){     hwnd tt=createwindowex(ws_ex_topmost,tooltips_class,null,ws_popup|tts_noprefix|tts_alwaystip,0,0,0,0,parent,null,null,null);     setwindowpos(tt,hwnd_topmost,0,0,0,0,swp_nomove|swp_nosize|swp_noactivate);     toolinfo ti;     ti.cbsize=sizeof(toolinfo);     ti.uflags=ttf_subclass|extraflags;     ti.hwnd=parent;     ti.hinst=null;     ti.uid=uid;     ti.lpsztext=tip;     getclientrect(parent,&ti.rect);     sendmessage(tt,ttm_addtool,0,(lparam)(lptoolinfo)&ti);     return tt;}  lresult callback wndproc(hwnd,uint,wparam,lparam);  class font{     private:         hfont hfont;     public:         font(const char* fname){             hfont=createfont(0,0,0,0,fw_normal,false,false,false,default_charset,out_default_precis,clip_default_precis,default_quality,default_pitch,fname);}         ~font(){             deleteobject(hfont);}         operator hfont(){             return hfont;}}courier("courier new");  bool get_filename(char* fname,int len,hwnd hwnd,bool save){     openfilename ofn;     zeromemory(&ofn,sizeof(openfilename));     ofn.lstructsize=sizeof(openfilename);     ofn.hwndowner=hwnd;     ofn.lpstrfilter="text files (*.txt)\0*.txt\0all files (*.*)\0*.*\0\0";     ofn.lpstrfile=fname;     ofn.nmaxfile=len;     ofn.lpstrtitle="text editor";     ofn.flags=ofn_filemustexist|ofn_hidereadonly;     if(save){         return getsavefilename(&ofn);}     else{         return getopenfilename(&ofn);}}  int winapi winmain(hinstance hprev,hinstance hinst,lpstr cmdline,int cmdshow){     wndclassex wcex;     //haccel haccel=loadaccelerators(hinst,makeintresource(accels));     hwnd hwnd;     msg msg;     hinst=hinst;     //register window     wcex.cbsize=sizeof(wndclassex);     wcex.style=cs_hredraw|cs_vredraw;     wcex.lpfnwndproc=wndproc;     wcex.cbclsextra=0;     wcex.cbwndextra=0;     wcex.hinstance=hinst;     wcex.hicon=null;     wcex.hcursor=null;     wcex.hbrbackground=(hbrush)(color_window+1);     wcex.lpszmenuname=makeintresource(mainmenu);     wcex.lpszclassname="imageeditor";     wcex.hiconsm=null;     if(!registerclassex(&wcex)){         show_error("error %i: failed register window.",getlasterror());         return -1;}     //create window     hwnd=createwindow("imageeditor","image editor",ws_visible|ws_overlappedwindow,cw_usedefault,cw_usedefault,cw_usedefault,cw_usedefault,null,null,hinst,null);     if(!hwnd){         show_error("error %i: failed create window.",getlasterror());         return -2;}     //show/update window     showwindow(hwnd,cmdshow);     updatewindow(hwnd);     //initialize common controls     /*initcommoncontrolsex iccex;     iccex.dwicc=icc_win95_classes;     iccex.dwsize=sizeof(initcommoncontrolsex);     initcommoncontrolsex(&iccex);*/     //go main program loop     while(getmessage(&msg,null,0,0)){         //if(!translateaccelerator(hwnd,haccel,&msg)){             translatemessage(&msg);             dispatchmessage(&msg);}//}     return msg.wparam;}  lresult callback wndproc(hwnd hwnd,uint msg,wparam wparam,lparam lparam){     static int sizes[]={260,330,420,520};     switch(msg){         case wm_create:             statusbar=createwindow(statusclassname,"",ws_child|ws_border|ws_visible,-100,-100,10,10,hwnd,null,hinst,null);             if(!statusbar){                 show_error("error %i: failed create statusbar.",getlasterror());}             //description|characters|size|lines|line|column             sendmessage(statusbar,sb_setparts,sizeof(sizes),(lparam)sizes);             break;         case wm_quit:             destroywindow(hwnd);             break;         case wm_destroy:             postquitmessage(0);             break;         case wm_command:             //switch(loword(wparam)){}             //break;         default:             return defwindowproc(hwnd,msg,wparam,lparam);}     return 0;} 

also, compiler doesn't recognize initcommoncontrolsex when should, commented out near end of winmain.

the bug in code need run initcommoncontrols before creating window. , forget initcommoncontrolsex() code, you'll better plain old initcommoncontrols.

remember check every function's return value , use getlasterror().

also, you're trying reinvent wheel , instead of rolling out own window creating procedure suggest take @ how others it, or use wtl, it's not difficult.