LINEPACK Field - lClipStartError

 lClipStartError (LONG) 
    Standard Bresenham error at the clipped start point. 

    Error is calculated from the initial error and the error increments 
    for major step and diagonal step. The initial error and the error 
    increments are as follows: 

    MAX 
              Maximum (ulAbsDeltaX, ulAbsDeltaY) 
    MIN 
              Minimum (ulAbsDeltaX, ulAbsDeltaY) 
    Major Increment 
              Increment to the error for stepping along the major axis: 
              2 * MIN. 
    Diagonal Increment 
              Increment to the error for stepping along the major and 
              minor axes: 
              2 * MIN - 2 * MAX. 
    Initial Error 
              Error at the start point: 
              2 * MIN - MAX, if LINE_DIR_X_POSITIVE is On. 

              2 * MIN - MAX - 1, if LINE_DIR_X_POSITIVE is Off. 
    Horizontal and vertical lines 
              The line is drawn from the clipped start to clipped end. 
              The lClipStartError will not be given. 
    First pel consideration 
              Set the first pel at ptlStart (not ptlClipStart) only if 
              LINE_DO_FIRST_PEL is set and the first pel is not clipped. 
    Last pel consideration 
              Set the last pel at ptlEnd (not ptlClipEnd) only if 
              LINE_DO_LAST_PEL is set and the last pel is not clipped. 
    Styling 
              Lines are styled using the ulStyleMask, ulStyleStep, and 
              ulStyleValue. 
              ulStyleMask 
                        A 32-bit style mask. 

              Error Value 
                        Error value at the current pel. 

              Mask Position 
                        Bit position of the ulStyleMask. 

                        If this bit is on, set the current pel to the 
                        ulFGColor through usForeROP; otherwise, set the 
                        current pel to the ulBGColor through usBackRop.