text: 
  // Pixel
  int servicepixelBackBufferPutpixel (void);
  
  // Line
  int servicelineBackbufferDrawHorizontalLine (void);
  
  // Char
  int serviceDrawChar(void);
  
  // Text
  int serviceDrawText(void);
  
  // Rectangle
  int serviceRefreshRectangle(void);
  
  // Window
  int serviceCreateWindow ( void );
  int serviceChangeWindowPosition(void);
  int serviceResizeWindow(void);
  int serviceRedrawWindow(void);
  int serviceRefreshWindow(void);
  
  // Button
  int serviceDrawButton (void); 
  
  
  
  // When a client send us an event
  int serviceClientEvent(void);
  
  // When a client get the next event from it's own queue.
  int serviceNextEvent(void);
  
  
  
  
  