# Dynamic linkage id in Object.registerClass ? How?
**URL:** https://forum.kirupa.com/t/dynamic-linkage-id-in-object-registerclass-how/4573
**Category:** flash
**Created:** [August 13, 2002, 4:14pm UTC](https://forum.kirupa.com/t/dynamic-linkage-id-in-object-registerclass-how/4573 "2002-08-13T16:14:09Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@Spongebob](https://forum.kirupa.com/u/Spongebob)
#### Post date: [August 13, 2002, 4:14pm UTC](https://forum.kirupa.com/t/dynamic-linkage-id-in-object-registerclass-how/4573/1 "2002-08-13T16:14:09Z")
Hi there,
Anybody knows a way of setting the linkage identifier of the movie clip symbol in the Object.registerClass dynamically?
If I write “LinkageId” between " " it works fine…
[COLOR=blue]Object.registerClass( **“LinkageId”** ,MyClass);[/COLOR]
BUT if I don’t use " " and try to set the contents of a variable, it doesn’t work ☹
[COLOR=red]
**myLinkId** = “XXX”;
Object.registerClass( **myLinkId** ,MyClass);[/COLOR]
I’ve already tried to concatenate " " to myLinkId and it still doesn’t work…
I need to dynamically register lots of MCs to myClass ☹
Anybody has a tip on how to do it ?
Thanks in advance,
Spongebob.
---
### Author:  [@system](https://forum.kirupa.com/u/system)
#### Post date: [August 14, 2002, 4:35pm UTC](https://forum.kirupa.com/t/dynamic-linkage-id-in-object-registerclass-how/4573/2 "2002-08-14T16:35:28Z")
Anybody … ? Please help me on this subject…☹
Any tip I can try will be helpful…
Thanks,
Spongebob
---
### Author:  [@system](https://forum.kirupa.com/u/system)
#### Post date: [August 14, 2002, 5:09pm UTC](https://forum.kirupa.com/t/dynamic-linkage-id-in-object-registerclass-how/4573/3 "2002-08-14T17:09:55Z")
Why do you always come up with tough questions like that? 😛
I’ve never actually programmed components, so I don’t have your answer, but I’ll try and ask my Chinese master, he may know.
pom :asian:
---
### Author:  [@system](https://forum.kirupa.com/u/system)
#### Post date: [August 14, 2002, 5:27pm UTC](https://forum.kirupa.com/t/dynamic-linkage-id-in-object-registerclass-how/4573/4 "2002-08-14T17:27:24Z")
Sorry :-\
I’ve lately came up with these strange things …, haven’t I ?
I hope this is the last thing I cannot solve by myself 🙂
Thanks for your and your master’s help =)
```
Spongebob.
```
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### Author:  [@system](https://forum.kirupa.com/u/system)
#### Post date: [August 15, 2002, 12:37am UTC](https://forum.kirupa.com/t/dynamic-linkage-id-in-object-registerclass-how/4573/5 "2002-08-15T00:37:20Z")
i was unable to get this method to work with anything aside from exported library assets. i’m not sure it that’s the intention or i was just doing it wrong.
are you able to set a particular movie clip’s class with this method?
with library assets though, it worked happily with or without variables. i exported an asset under the name “sqr” from the library and this code worked fine:
```auto
function Classy(){
this.class = "Classy";
this.onMouseUp = function(){ trace("i'm classy!"); };
};
item = "sqr";
Object.registerClass(item,Classy);
_root.attachMovie("sqr","square",0);
```
i’m thinking that you’re trying to do something a little different but i’m not sure what.
for a heavy read, you could browse dave yang’s site on oop in flash.
[http://www.quantumwave.com/flash/](http://www.quantumwave.com/flash/)
---
### Author:  [@system](https://forum.kirupa.com/u/system)
#### Post date: [August 15, 2002, 1:40pm UTC](https://forum.kirupa.com/t/dynamic-linkage-id-in-object-registerclass-how/4573/6 "2002-08-15T13:40:10Z")
Great sbeener ! =)
This is exactly what I’m trying to do!, worked marvellous!
I now know what I was doing wrong :\*(
I was trying to register the item with the class right after the attachMovie sentence !! I’m such a #?$#"&% !! ☹
Thank you very much for your help!
Regards,
Spongebob.