title: creating rebar control and introduction a band with toolbar into the rebar
body: <p>I use this code to create a rebar control, and introduction a band with toolbar into the rebar.<br>
  But when window is shown up, I can not see the toolbar. and when I check the height of the rebar, in this line of code: <code>int height = wp.rcNormalPosition.bottom - wp.rcNormalPosition.top;</code> I find rebar's height is only 4 pixels.  </p>
  
  <pre><code>#include &lt;windows.h&gt; 
  #include &lt;stdlib.h&gt;
  #include &lt;CommCtrl.h&gt;
  #pragma comment(lib, "comctl32.lib")
  
  LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
  HINSTANCE instance;
  
  int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
  {
      instance = hInstance;
  
      WNDCLASSEX wcex; 
  
      wcex.cbSize = sizeof(WNDCLASSEX);
      wcex.style           = CS_HREDRAW | CS_VREDRAW; 
      wcex.lpfnWndProc    = WndProc; 
      wcex.cbClsExtra     = 0; 
      wcex.cbWndExtra     = 0;  
      wcex.hInstance      = hInstance;
      wcex.hIcon          = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_APPLICATION));  
      wcex.hCursor        = LoadCursor(NULL, IDC_ARROW); 
      wcex.hbrBackground  = (HBRUSH)(COLOR_WINDOW+1); 
      wcex.lpszMenuName   = NULL; 
      wcex.lpszClassName  = L"Example"; 
      wcex.hIconSm        = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_APPLICATION));
  
      RegisterClassEx(&amp;wcex);
  
      HWND hWnd = CreateWindow(L"Example", L"", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT,
          500, 500, NULL, NULL, hInstance, NULL);
  
      // Initialize common controls.
      INITCOMMONCONTROLSEX icex;
      icex.dwSize = sizeof(INITCOMMONCONTROLSEX);
      icex.dwICC   = ICC_COOL_CLASSES | ICC_BAR_CLASSES;
      InitCommonControlsEx(&amp;icex);
  
      HWND hwndRebar = CreateWindowEx(WS_EX_TOOLWINDOW, REBARCLASSNAME, NULL, WS_CHILD | WS_VISIBLE | WS_BORDER, 
                      0, 0, 100, 50, hWnd, NULL, instance, NULL);
  
      // create toolbar
      HWND hWndToolbar = CreateWindowEx(0 , TOOLBARCLASSNAME, NULL, WS_CHILD | TBSTYLE_TOOLTIPS,
              0, 0, 0, 0, hwndRebar, (HMENU)0, instance, NULL);
  
      HIMAGELIST hImageList = ImageList_Create(16, 16, ILC_COLOR16 | ILC_MASK, 3, 0);
  
      SendMessage(hWndToolbar, TB_SETIMAGELIST, (WPARAM)0, (LPARAM)hImageList);
      SendMessage(hWndToolbar, TB_BUTTONSTRUCTSIZE, (WPARAM)sizeof(TBBUTTON), 0);
  
      TBBUTTON tbb[4] = 
      {
          {0,0,TBSTATE_ENABLED,TBSTYLE_BUTTON},
          {1,1,TBSTATE_ENABLED,TBSTYLE_BUTTON},
          {2,2,TBSTATE_ENABLED,TBSTYLE_BUTTON},
      };
  
      SendMessage(hWndToolbar, (UINT) TB_ADDBUTTONS, 3, (LPARAM)&amp;tbb);
  
      SendMessage(hWndToolbar, TB_AUTOSIZE, 0, 0);
      ShowWindow(hWndToolbar , SW_SHOW);
  
      // Initialize band info.
      REBARBANDINFO rbBand = { sizeof(REBARBANDINFO) };
      rbBand.fMask  = RBBIM_STYLE | RBBIM_TEXT | RBBIM_CHILD | RBBIM_CHILDSIZE | RBBIM_SIZE | RBBIM_COLORS;
  
      rbBand.fStyle = RBBS_GRIPPERALWAYS;  
  
      // Get the height of the toolbar.
      DWORD dwBtnSize = (DWORD)SendMessage(hWndToolbar, TB_GETBUTTONSIZE, 0,0);
  
      // Set values unique to the band with the toolbar.
      rbBand.clrFore = RGB(233, 233, 233);
      rbBand.clrBack = RGB(200, 200, 200);
      rbBand.lpText = TEXT("");
      rbBand.hwndChild = hWndToolbar;
      rbBand.cyChild = LOWORD(dwBtnSize);
      rbBand.cyMinChild = LOWORD(dwBtnSize);
      rbBand.cxMinChild = 3 * HIWORD(dwBtnSize);
      // The default width is the width of the buttons.
      rbBand.cx = 0;
  
      // Add the band
      SendMessage(hwndRebar, RB_INSERTBAND, (WPARAM)-1, (LPARAM)&amp;rbBand);
  
      // show the main window
      ShowWindow(hWnd, nCmdShow);
  
      // check the rebar size
      WINDOWPLACEMENT wp;
      GetWindowPlacement(hwndRebar, &amp;wp);
      int height = wp.rcNormalPosition.bottom - wp.rcNormalPosition.top;
  
      MSG msg;
  
      while (GetMessage(&amp;msg, NULL, 0, 0))
      {
          TranslateMessage(&amp;msg);  
          DispatchMessage(&amp;msg); 
      }
  
      return (int) msg.wParam;
  }
  
  LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
  {
      switch (message)
      {
          case WM_CREATE: 
              return 0;
  
          default:
              return DefWindowProc(hWnd, message, wParam, lParam);
      }
  }
  </code></pre>