Windows 7 - Deleting partition

so i messed up again....

I was going to install windows xp in a seperate partition on my hard drive but didnt need to in the because that was a different matter. But then i wanted to delete that partition that i created and restore my original storage back on to my hard drive. But all i did was delete the partition and now i am missing the amount of storage that i used to have. Is there a way to get it back without re-formatting, hopefully a simple way?

after note: just realized its moved to unallocated space, how do i add that to C: drive?

I would format as a DATA partition.
Partition or Volume - Create New

Thanks, i sort of understand it now. But only problem is i don't want to add new volume because I would like to add it to main hard drive.

Partition or Volume - Extend

Wow, thanks so much! exactly what i was looking for (y)

You are welcome.