Authentication code in C#

Question

HI,

I need to code in C# to input a username and password for an authentication dialog box in Windows while trying to access a share in another system. The idea here is to pass the username and password in a function as argument so that this function will automatically enter both (username and password) once the Windows dialog box for Aithentication pop ups while accessing a share in any other system.
Can you please help me out with any API or any other piece of code to work out!:)