[Brad-]

So I've put a file in there and dismounted. So the file is now encrypted, yes?

How do I access the newly-encrypted file?

[Brad-]

Yes the file is encrypted now. Again open TrueCrypt , click on "select file" , then select your encrypted file (folder). Click on "Mount" , Enter password. Done.

and the file is in there. So if I moved the file out of the new drive I created, will it remain encrypted?

[Brad-]

No it won't remain encrypted if you move the file out of the new drive. Once you dismount , your new drive will disappear :)

So how do I encrypt a file that I can send to someone so that it is undetectable?

[Died]

Vouching thanks so much I was looking for a good tutorial