How to set PointerColor when msppt.olb is used

there is DrawLine(float BeginX, float BeginY, float EndX, float EndY) funcation in the msppt.olb (office2013),but the color of the pen is black,i wonder if there is some way to set pen color.i found that there was GetPointerColor() in class SlideShowSettings and class SlideShowView,but there is no SetPointerColor() function. There is method to set the pen color by VBA,see here:  http://msdn.microsoft.com/EN-US/library/office/ff744891(v=office.15).aspx  , can you tell me how to set pointer color when msppt.olb is used with c++ and how to set the width of the pen when Drawing