ChemDraw DDE Topics
There are three topics available, "DLL", "CFWIN" and "SYSTEM". The first two are used for SDK menu add-ons and ChemFinder/Windows, respectively. The last is for general purpose use. Topic names are not case-sensitive. The server version may be appended to the topic as a version compatibility measure. The current server version is 1. The topic names "SYSTEM", "SYSTEM#1", "DLL" and "DLL#1" are all legal.

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