See other post said, add variables will appear after insert activeX control mscomm. H file, but I don't have, may be what went wrong, and I add variables to the default type is COCX, I didn't change, why to is not defined in the program

CodePudding user response:

It is recommended to use the API compatibility strong Serial Communications in Win32

CodePudding user response:

Should be CMSComm, COCX is what class