non-pixelated lines

Hey gang! Do you know of a way to get absolute non-pixelated 45 degree lines in photoshop? I'm a little tired of having to go back and forth from illustrator just to get clean lines. Thanks in advance.

Use the line tool in PS - thats vector

Thank you. Now how about clean curved lines?

The pen tool in PS also does curved lines... But it is a bitmap based program, which means that the curves are made of squares put together, so you're not going to get perfectly curved lines.

Thanks a mil.