Jack.
There must be something I'm missing here. Isn't "doing nothing at all"
exactly the same as "drawing a transparent line"?
If you want a line you can draw and then undraw without impacting the
background, just use a solid pen, but use SetROP2(dc, R2_XORPEN);.
--
- Tim Roberts, ti...@probo.com
Providenza & Boekelheide, Inc.