diff --git a/source/code/CppSdl/CppSdlImageHolder.hpp b/source/code/CppSdl/CppSdlImageHolder.hpp
index 73607bf..ad42bfb 100644
--- a/source/code/CppSdl/CppSdlImageHolder.hpp
+++ b/source/code/CppSdl/CppSdlImageHolder.hpp
@@ -16,19 +16,61 @@ namespace CppSdl {
 
 class CppSdlImageHolder {
 public:
+    /**
+     * Creates a nulled ImageHolder (without data)
+     */
     CppSdlImageHolder();
+    /**
+     * Creates an image from a file
+     * @param filename to be loaded
+     */
     CppSdlImageHolder(std::string filename);
+    /**
+     * Creates a copy. The new copy shares raw data with the original but is otherwise independent.
+     * @param orig
+     */
     CppSdlImageHolder(const CppSdlImageHolder& orig);
     CppSdlImageHolder(char *rawdata, int datasize);
     virtual ~CppSdlImageHolder();
+    /**
+     * This gives access direct access to the internal data.
+     * Careful, the data might be shared between multiple ImageHolders, 
+     * chaing one will change them all.
+     * @return A pointer
+     */
     SDL_Surface *GetRawDataInsecure();
     CppSdlImageHolder & operator=(const CppSdlImageHolder &rhs);
     void Cut(Uint32 x,Uint32 y,Sint32 w,Sint32 h);
+    /**
+     * The width of the image
+     * 0 if the image is nulled
+     * @return The width of the image in pizels
+     */
     Uint32 GetWidth();
+    /**
+     * The height of the image
+     * 0 if the image is nulled
+     * @return  The height of the image
+     */
     Uint32 GetHeight();
+    /**
+     * Draws an image to surface at a given position. 
+     * If the image is nulled nothing is drawn
+     * @param target Destination surface
+     * @param x horizontal placement on destination surface
+     * @param y vertical placement on destination surface
+     */
     void PaintTo(SDL_Surface *target, int x, int y);
     void OptimizeForBlit(bool allowAlpha = true);
+    /**
+     * Tests if there are data in the object
+     * @return true if where are data in the object
+     */
     bool IsNull();
+    /**
+     * Removes the data in the object.
+     * Once all ImageHolders pointing to the same data has been freed the internal data will be freed too
+     */
     void MakeNull();
 private:
     void Initialized(); //throws an exception if *data is null