how can you copy a file over network

[mghilan]

I am working on project to copy some files from many PCs to my Computer
I made this code

FileSystem.FileCopy("\\RemotePC\C$\Dir\File.txt", "C:\file.txt")

the problem is that every PC has an own username and password so this code doesn`t work
Is there any way to write the username and password when i use sharing folder