This is very very very easy.
1. Download and install a free or purchased barcode font in the server machine and restart it (this is needed to print server side)
2. Do the same in all development client machines
3. Design your report and in the textbox that has to print the barcode, select FontFamily. In the Font Family you should be able to see the name of your barcode. Select that one.
End of the story.
Some important notes
1. Font MUST be TrueType (and not open type or whatever)
2. Font embeddability must not be restricted
You will find these font properties shown in the windows/font directory after you have installed the font/font family.
Ejnoy.