Jim- You might try the following: http://www.download.com/Franson-SerialTools-SDK/3000-10253_4-10377423.html?tag=lst-0-2 It enables you to add/manage additional virtual ports, etc. and costs 30ドル. Hope this helps. 73, Bob W7BJ I would like to share a single COM (serial) port between two applications (DX4WIN and Writelog), so they can both have access to rig control. Jozef OM7ZZ sent me a link to a product from Eltima: http://www.eltima.com/products/serialsplitter/ This seems like a rather expensive solution (100ドル). Does anyone have direct experience with this or similar products before I go out and spend that kind of money? 73 - Jim AD1C