function _main(){
 var label=0;
 var tempVarArgs=0;
 var sp=STACKTOP; (assert((STACKTOP|0) < (STACK_MAX|0))|0);
 var $1=_printf(8,(tempVarArgs=STACKTOP,STACKTOP = (STACKTOP + 1)|0,STACKTOP = (((STACKTOP)+7)&-8),(assert((STACKTOP|0) < (STACK_MAX|0))|0),HEAP32[((tempVarArgs)>>2)]=0,tempVarArgs)); STACKTOP=tempVarArgs;
 STACKTOP=sp;return 0;
}

/* memory initializer */ allocate([104,101,108,108,111,32,119,111,114,108,100,10,0,0,0,0], "i8", ALLOC_NONE, Runtime.GLOBAL_BASE)

function _printf(format, varargs) {
  // int printf(const char *restrict format, ...);
  // http://pubs.opengroup.org/onlinepubs/000095399/functions/printf.html
  var stdout = HEAP32[((_stdout)>>2)];
  return _fprintf(stdout, format, varargs);
}

function _write(fildes, buf, nbyte) {
  // ssize_t write(int fildes, const void *buf, size_t nbyte);
  // http://pubs.opengroup.org/onlinepubs/000095399/functions/write.html
  var stream = FS.getStream(fildes);
  if (!stream) {
    ___setErrNo(ERRNO_CODES.EBADF);
    return -1;
  }
  try {
    var slab = HEAP8;
    return FS.write(stream, slab, buf, nbyte);
  } catch (e) {
    FS.handleFSError(e);
    return -1;
  }
}

// src/shell.js
else if (ENVIRONMENT_IS_WEB || ENVIRONMENT_IS_WORKER) {
    Module['print'] = function print(x) {
      console.log(x);
    };
}

var LibraryWin32 = {
    MessageBoxW: function(hwnd, $message, $title, v) {
        // TODO
        console.log("hwnd:", hwnd, "$message:", $message, "$title:", $title, "v:", v);
    }
};

mergeInto(LibraryManager.library, LibraryWin32);

System = (function() {
    function System(desktop) {
        this.desktop = desktop;
        this.mq = [];
        this.classes = {};
        this.active_window = null;
    }

    return System;
})();

system = new System(window.Win32.desktop);
window.Win32.system = system;

Class = (function() {
    function Class(clsname, wnd_proc) {
        this.clsname = clsname;
        this.wnd_proc = wnd_proc;
    }

    return Class;
})();

window.Win32.Class = Class;

RegisterClassW: function($cls) {
    var clsname = Util.u16(getValue($cls + 36, 'i32'));
    var wnd_proc = getValue($cls + 4);
    var cls = new window.Win32.Class(clsname, wnd_proc);
    window.Win32.system.classes[clsname] = cls;
    return 0;
},

var FUNCTION_TABLE = [0,0,_wnd_proc];
...
function _wnd_proc($wnd, $msg, $wparam, $lparam) {
...
}

    var func = FUNCTION_TABLE[wnd_proc];
    var ret = func(hwnd, msg, wparam, lparam);

var Window = (function() {
    function Window(hwnd, clsname, name, style, x, y, w, h, parent, m, i, param, exstyle) {
        ...
    }

    Window.prototype.on_proc = function(m, w, l) {
        var ret = 0;
        if (this.cls && this.cls.wnd_proc) {
          var func = FUNCTION_TABLE[this.cls.wnd_proc];
          if (func) {
            ret = func(this.hwnd, m, w, l);
          }
        } else {
          ret = this.def_proc(m, w, l);
        }
        this.on_after_proc(m, w, l, ret);
        return ret;
    };

    Window.prototype.on_after_proc = function(m, w, l, ret) {
        switch (m) {
            case 0x0001: // WM_CREATE
                if (ret === 0) {
                    this.on_create();
                }
            break;
            case 0x0002: // WM_DESTROY
                this.on_destroy();
            break;
            case 0x0003: // WM_MOVE
                this.on_move(l & 0xFFFF, l >> 16);
            break;
            case 0x0005: // WM_SIZE
                this.on_size(l & 0xFFFF, l >> 16);
            break;
            case 0x0018: // WM_SHOW
                this.on_show();
            break;
        }
        this.reshape();
        return ret;
    };
    ...
    return Window;

})();

window.Win32.Window = Window;

var LibraryWin32 = {
    ...
    emscripten_win32_loop: function() {
        return setTimeout(window.Win32.system.main_loop, 0);
    },
    ...
};

var __bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; };

System = (function() {
    function System(desktop) {
        this.desktop = desktop;
        this.main_loop = __bind(this.main_loop, this);
        this.mq = []; // message queue
    }

    System.prototype.main_loop = function() {
        while (this.mq.length > 0) {
            msg = this.mq.shift();
            this.send_msg(msg);
        }
        return setTimeout(this.main_loop, 500);
    };
...

    var me = $("<div class='window' id='hwnd-" + this.hwnd + "'/>");
    Var title_bar = $("<div class=\"title-bar\">\n    <div class=\"title-icon\"></div>\n    <div class=\"title\">" + this.name + "</div>\n    <div class=\"title-button-group\">\n        <div class=\"title-button minimize\"></div>\n        <div class=\"title-button maximize\"></div>\n        <div class=\"title-button close\"></div>\n    </div>\n</div>");
    me.append(title_bar);
    Var inner_win = $("<div class='inner-window' style='width: 100%; height: 100%; position: relative;'/>");
    me.append(inner_win);