How can I make self decrypting file?

[Sathyavady]

Can any body help me to develop an application that will encrypt a file ,this encrypted file should be self extractable in a machine in which the encryption tool not installed ..How is it possible ?how can we associate a file with an exe that contains the decrypting mechanism ...?
Thanks..

 

[palbano]

this encrypted file should be self extractable in a machine in which the encryption tool not installed

You must means something other than what you posted yes? Maybe you could clarify.

-pete