Code:
Imports System.IO
Public Class frmCopyFile
    Dim FromFile As String = ""
    Dim ToFile As String = ""

    Private Sub frmCopyFile_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        txtFile.Text = "Data.txt"
        txtFromMachine.Text = "D:\Test\"
        FromFile = Trim(txtFromMachine.Text) + Trim(txtFile.Text)
        txtToMachine.Text = "\\isoftnode\test\"
        ToFile = Trim(txtToMachine.Text) + Trim(txtFile.Text)
        txtUserName.Text = "Rajat"
        txtPassword.Text = "abc123"
    End Sub

    Private Sub cmdCopy_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdCopy.Click
        Try
            My.Computer.FileSystem.CopyFile(FromFile, ToFile, True)
        Catch ex As Exception
            MsgBox(ex.Message)
            Exit Sub
        End Try
        MsgBox("File Copy Successfully")
    End Sub
End Class