Access a compputer on the network

HI,

I m working on Mac 10.4.7.I am in a network workgroup Workgroup,
I want to access the computer in my network some of them having Mac OS and Other r having windows OS.

Can anybody know how to access a window computer from mac.

Thanks

Check this out.

Hi novicew,

Now i m able to connect my computer with the other system on the network.

Thanks