WindowProc()ハンドラ：
 LRESULT CTaskbar2Dlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam)
 {
     // TODO: ここに特定なコードを追加するか、もしくは基本クラスを呼び出してください。
     static UINT msgTBC = (UINT)-1;
     static HICON hIcon1 = 0;
     static HICON hIcon2 = 0;
     static THUMBBUTTON button;
     static BOOL bRun = FALSE;
	
     switch(message){
     case WM_CREATE:
         msgTBC = RegisterWindowMessage(_T("TaskbarButtonCreated"));
         hIcon1 = AfxGetApp()->LoadIcon(IDI_ICON1);
         hIcon2 = AfxGetApp()->LoadIcon(IDI_ICON2);
         //権限を昇格する場合を考慮するならメッセージフィルタにスルー指示を行う
         //ChangeWindowMessageFilter(msgTBC , MSGFLT_ADD);
         //ChangeWindowMessageFilter(WM_COMMAND, MSGFLT_ADD);
         break;
     case WM_COMMAND:
         int const CtlId = LOWORD(wParam);
         switch (CtlId){
         case IDTB_BUTTON1://Thumbnail ボタン１が押された処理
             {
                 BOOL bNextState = FALSE;
                 if(TRUE == bRun){
                     button.dwMask = THB_ICON|THB_TOOLTIP;
                     button.hIcon = hIcon1;//Pause
                     StringCchCopy(button.szTip, 
                     ARRAYSIZE(button.szTip), 
                         _T("Pause"));
                     bNextState = FALSE;
                 }
                 else{
                     button.dwMask = THB_ICON|THB_TOOLTIP;
                     button.hIcon = hIcon2;//Run
                     StringCchCopy(button.szTip, 
                         ARRAYSIZE(button.szTip), _T("Run"));
                     bNextState = TRUE;
                 }
                 // Create an instance of ITaskbarList3

                 ITaskbarList3 *ptbl;
                 HRESULT hr = CoCreateInstance(CLSID_TaskbarList, NULL,
                     CLSCTX_INPROC_SERVER, IID_PPV_ARGS(&ptbl));

                 if (SUCCEEDED(hr)){
                     // Attach the toolbar to the thumbnail.
                     hr = ptbl->ThumbBarUpdateButtons(this->m_hWnd, 
                         1, &button);
                     if(SUCCEEDED(hr)){
                         bRun = bNextState;
                     }
                 }
                 else{
                     //error !comインスタンス生成失敗
                 }
                 ptbl->Release();
             }
             return 0;
         }
         break;
		
     }
     if(message == msgTBC){
         //The taskbar button has been created
         button.dwMask = THB_ICON|THB_TOOLTIP|THB_FLAGS;
         button.iId = IDTB_BUTTON1;
         button.hIcon = hIcon2;//Run
         StringCchCopy(button.szTip, ARRAYSIZE(button.szTip), 
             _T("Run"));
         button.dwFlags = THBF_ENABLED;
		
         // Create an instance of ITaskbarList3
         ITaskbarList3 *ptbl;
         HRESULT hr = CoCreateInstance(CLSID_TaskbarList, NULL, 
             CLSCTX_INPROC_SERVER, IID_PPV_ARGS(&ptbl));
		
         if (SUCCEEDED(hr)){
             // Attach the toolbar to the thumbnail.
             hr = ptbl->ThumbBarAddButtons(this->m_hWnd, 1, &button);
             if(SUCCEEDED(hr)){
                 bRun = TRUE;
             }
         }
         else{
             //error !comインスタンス生成失敗
         }
         ptbl->Release();
		
     }
		
     return CDialog::WindowProc(message, wParam, lParam);
 }