diff --git a/app/SubWindowHandle.h b/app/SubWindowHandle.h
index f7e01f3..62fb936 100644
--- a/app/SubWindowHandle.h
+++ b/app/SubWindowHandle.h
@@ -122,11 +122,28 @@ public:
 
   virtual Bool mayClose();
 
+  /**
+   * Get category of the SubWindow
+   * @return category value based on enum SubWindowCategories
+   * @note This function should be used with enum SubWindowCategories
+   *        with an & operation and it may belong to several categories
+   */
   UInt getCategory()
   {
     return m_uiCategory;
   }
 
+  /**
+   * Check category of the SubWindow
+   * @param checkCateory SubWindow category to check against;
+   *        it should be enum SubWindowCategories type
+   * @return true when SubWindow belong to checkCateory
+   */
+  Bool checkCategory( UInt checkCateory )
+  {
+    return m_uiCategory & checkCateory;
+  }
+
   Void setSubWindow( PlaYUVerMdiSubWindow* subWindow )
   {
     m_cSubWindow = subWindow;
diff --git a/app/VideoSubWindow.cpp b/app/VideoSubWindow.cpp
index 8f960c3..4247a98 100644
--- a/app/VideoSubWindow.cpp
+++ b/app/VideoSubWindow.cpp
@@ -123,7 +123,7 @@ Void VideoSubWindow::loadAll()
 
 Void VideoSubWindow::refreshSubWindow()
 {
-  if( getCategory() == SubWindowHandle::VIDEO_STREAM_SUBWINDOW )
+  if( getCategory() & SubWindowHandle::VIDEO_STREAM_SUBWINDOW )
   {
     Int currFrameNum = m_pCurrStream->getCurrFrameNum();
     if( !loadFile( m_cFilename, false ) )