# Re: C Extensions not working on Windows XP 64

**URL:** <https://www.ruby-forum.com/t/re-c-extensions-not-working-on-windows-xp-64/54133>\
**Category:** Ruby\
**Created:** [February 23, 2006, 10:34pm UTC](https://www.ruby-forum.com/t/re-c-extensions-not-working-on-windows-xp-64/54133 "2006-02-23T22:34:28Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![BergerS\_Daniel](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/b/bc8723/32.png) [@BergerS\_Daniel](https://www.ruby-forum.com/u/BergerS_Daniel)\
**Post date:** [February 23, 2006, 10:34pm UTC](https://www.ruby-forum.com/t/re-c-extensions-not-working-on-windows-xp-64/54133/1 "2006-02-23T22:34:28Z")

</div>

> to load into ruby on Windows XP.

> void Init\_simple()  
> {
> 
> csimple = rb\_define\_class(“simple”,rb\_cObject);

Classes are constants. Change that line to:

csimple = rb\_define\_class(“Simple”, rb\_cObject);

Then create an instance in Ruby with Simple.new.

Regards,

Dan