ActiveX Problem

I'm creating a new ActiveX control in VB6 Enterprise. The ocx file compiles fine when I choose "Make myControl.ocx", but it seems to get a new class ID (that long string of numbers and letters) every time. As a result, my applications don't recognize a new version of the control. What's going on?

[PaulLewis]

That is how I deliberately change the prog id.

Check out this link which is a good essay about the prog id's...

http://www.vbaccelerator.com/progid.htm

Cheers
PAul Lewis

You have to set the program to have binary compatiblity with the last ocx you created.

If you go to your menu

Project->project Properties(at bottom of menu)
Then click on the Component tab, the bottom box handles component compatibility. Select the binary compatiblity and choose it to be compatible with the .ocx you are creating.

Now, everytime you do a make it will have the same GUID.

You learn something new every day. Thanks gargamehl.

[mattbrown]

Be very careful when using binary compatibillty however.

VB changes teh classID for a good reason.

If you change the component too much, ie data types returned / passed to functions, you can cause your whole machine to crash

If you aren't changing function prototypes etc though you shuold be fine

[Gaurav]

Mate,
I suggest u read up the article on Binary compatibility in MSDN before u go for it... especially if this is a Billable project It can cause a helluva lot of head aches at ALL teh wrong times....

cheers
Gaurav