Modifies polyline vertex in selected CAD data.LTCustomizer21 for AutoCAD LT reference manual

ActiveX
    Function set_select_polyline_vertex(ename As Integer, index As Integer, x As Double, y As Double, z As Double) As Boolean
C/C++
    int WINAPI LTC_set_select_polyline_vertex(int ename,int index,double xyz[3]);

parameter
ename:index number read by select(). Specifies a value in range of 0 - return value of select() -1.
index:index number of polyline. Specifies a value in range of 0 - return value of get_select_polyline() - 1.
x,y,z or xyz[] :XYZ coordinate you want to change(1st index is X. 2nd index is Y. 3rd index is Z)

return value
ActiveX: True: success .False: failure
C/C++: 1: success .0: failure