Import ActiveX MSCOMM32 Error

[amandarila]

Hi ,

I want to use MSCOMM32 instand of VISA serial port. 

I download MSCOMM.ocx and then added this file to the System directory and registered it using the following command: "regsvr32 C:\Windows\system32\MSCOMM.OCX".but when i import ActiveX(Microsoft communication control, version 6.0), it popup a dialog box as picture1 showing."class is not licensed for use".

I google some solution. some tips suggests me to use vb6cli.exe(a utility designed to fix License problems with ActiveX Controls). http://support.microsoft.com/kb/194751

so bad, when i install vb6cli.exe, it shows"Visual Basic 6.0 is not detected on this system".

I donot know whether i should install Visual Basic 6.0 Enginee?

I can not believe a AciveX is so difficult to install before i can use!!

Anyone can provide me any solution.

[amandarila]

Oooh , still nobody can help me.....

[pincpanter]

Registering the ActiveX makes it available for use at run-time, not design-time (i.e. programming).

To program with MSCOMM32 you need to install VB6.

[smercurio_fc]

---

@amandarila wrote:

Hi ,

I want to use MSCOMM32 instand of VISA serial port. 

---

why?

[PJS]

the .Net api may be easier to use.  If you click the link in my signature, I have them posted on my website.  

NOTE:  I implemented them to talk to a very basic serial device, nothing complicated and allows you to NOT install the VISA runtime if you are ONLY doing serial communication.  This said, they have not been robustly debugged.  But any issues should be able to be resolved using MSDN.

BR

-p

[amandarila]

Because VISA serial port use inquiry mode to read serial data, that wastes too much CPU timeslice.

However MScomm32 support event-triggered, it will work efficiently.

[amandarila]

Because VISA serial port use inquiry mode to read serial data, that wastes too much CPU timeslice.

However MScomm32 support event-triggered, it will work efficiently.

[amandarila · Accepted solution]

Yeah, I slove it with microsoft web tips.

run a register file as below information:

[HKEY_CLASSES_ROOT\Licenses\4250E830-6AC2-11cf-8ADB-00AA00C00905] 

@ = "kjljvjjjoquqmjjjvpqqkqmqykypoqjquoun"

Any way, I make it.

Thanks for all of you

Nice day, nice beginning...

[Dennis_Knutson]

Unless, of course, you use VISA events.

[smercurio_fc]

---

@Dennis Knutson wrote:

Unless, of course, you use VISA events.

---

Like the example shown in this KB article: http://digital.ni.com/public.nsf/allkb/179E61F87CF8B340862571EA0037CFA3