Tried many ways to try later in several other machines should be found found to be less ActiveX controls and then register it now share the hope can help people in need specific steps is: find a Windows/system32/mscomm32. The ocx copy to want to use the computer corresponding directory
CMD type regsvr32 C: \ Windows \ system32 \ mscomm32 ocx enter
If we can't registered is copied to the Windows \ syswow64 CMD input regsvr32 C: \ Windows \ \ syswow64 \ mscomm32 ocx enter

CodePudding user response:

MFC serial port

CodePudding user response:

Find the problem

CodePudding user response:

Direct use win32API wouldn't have this kind of problem

CodePudding user response:

Collapsed in the pop-up dialog box, press the corresponding button to enter debugging press Alt + 7 key to view the Call Stack, namely "the Call Stack" from the inside to the following out of from the inner to outer function Call history, double-click a row to the cursor to the Call of the source code or assembly instruction, don't understand when double click on the next line, until we can read ,