data transfer!

Hi
Your question is not that much clear? u want to developed a data sender which pass data via bluetooth . But is it for your mobile or is it for your pc?
For the mobile-if it is java enable try to use j2me
For the smartphone-like pocket pc try to use C# .NET life become more easy
For your PC?
by j2me-their is some step to follow
for server
>>Established the blutooth service,
>>accepts connections
>>and send the requested data
For the client
>>Initialize blutooth device
>>search forblutooth services,
>>presents them to user and picks his/her choice,
>>finally download the choosen data