text: // Copyright (c) 2015 The Chromium Embedded Framework Authors. All rights
  // reserved. Use of this source code is governed by a BSD-style license that
  // can be found in the LICENSE file.
  
  #include "cefclient/browser/temp_window_win.h"
  
  #include <windows.h>
  
  #include "include/base/cef_logging.h"
  
  namespace client {
  
  namespace {
  
  const wchar_t kWndClass[] = L"Client_TempWindow";
  
  // Create the temp window.
  HWND CreateTempWindow() {
    HINSTANCE hInstance = ::GetModuleHandle(NULL);
  
    WNDCLASSEX wc = {0};
    wc.cbSize = sizeof(wc);
    wc.lpfnWndProc = DefWindowProc;
    wc.hInstance = hInstance;
    wc.lpszClassName = kWndClass;
    RegisterClassEx(&wc);
  
    // Create a 1x1 pixel hidden window.
    return CreateWindow(kWndClass, 0, WS_OVERLAPPEDWINDOW | WS_CLIPCHILDREN, 0, 0,
                        1, 1, NULL, NULL, hInstance, NULL);
  }
  
  TempWindowWin* g_temp_window = NULL;
  
  }  // namespace
  
  TempWindowWin::TempWindowWin() : hwnd_(NULL) {
    DCHECK(!g_temp_window);
    g_temp_window = this;
  
    hwnd_ = CreateTempWindow();
    CHECK(hwnd_);
  }
  
  TempWindowWin::~TempWindowWin() {
    g_temp_window = NULL;
    DCHECK(hwnd_);
    DestroyWindow(hwnd_);
  }
  
  // static
  CefWindowHandle TempWindowWin::GetWindowHandle() {
    DCHECK(g_temp_window);
    return g_temp_window->hwnd_;
  }
  
  }  // namespace client
  