LINEPACK Field - ulFlags

 ulFlags (ULONG) 
    Flags used for the LINEPACK data structure. 

    LINE_DO_FIRST_PEL             Draws the first pel. 

    LINE_DIR_Y_POSITIVE           Indicates line direction is 
                                  bottom-to-top. 

    LINE_HORIZONTAL               Indicates line is horizontal. No 
                                  Bresenham algorithm. 

    LINE_X_MAJOR                  Line is XMAJOR. 

    LINE_DIR_X_POSITIVE           Indicates line direction is 
                                  left-to-right. 

    LINE_VERTICAL                 Indicates line is vertical. No Bresenham 
                                  algorithm. 

    LINE_STYLE_X_MAJOR            Line style is XMAJOR. 

    LINE_DO_LAST_PEL              Draws the last pel.