Dealing with long file names in VB.NET

Public Class Form1

    Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
        IOWin32.UnicodeWin32.Functions.CopyFile_Win32(TextBox1.Text, TextBox2.Text)

    End Sub

    Private Sub Button2_Click(sender As System.Object, e As System.EventArgs) Handles Button2.Click
        IOWin32.UnicodeWin32.Functions.DeleteFile_Win32(TextBox3.Text)

    End Sub

    Private Sub Button3_Click(sender As System.Object, e As System.EventArgs) Handles Button3.Click
        IOWin32.UnicodeWin32.Functions.CreateDir_Win32(TextBox4.Text)

    End Sub

    Private Sub Button4_Click(sender As System.Object, e As System.EventArgs) Handles Button4.Click
        IOWin32.UnicodeWin32.Functions.CopyDir_Win32(TextBox6.Text, TextBox5.Text)

    End Sub

    Private Sub Button5_Click(sender As System.Object, e As System.EventArgs) Handles Button5.Click
        IOWin32.UnicodeWin32.Functions.GetFilesIncludeSubDirs_Win32(TextBox7.Text)

    End Sub

    Private Sub Button6_Click(sender As System.Object, e As System.EventArgs) Handles Button6.Click
        IOWin32.UnicodeWin32.Functions.GetDirsIncludeSubDirs_Win32(TextBox8.Text)
    End Sub

    Private Sub Button7_Click(sender As System.Object, e As System.EventArgs) Handles Button7.Click
        IOWin32.UnicodeWin32.Functions.GetDirs_Win32(TextBox9.Text)

    End Sub

    Private Sub Button8_Click(sender As System.Object, e As System.EventArgs) Handles Button8.Click
        IOWin32.UnicodeWin32.Functions.GetFiles_Win32(TextBox10.Text)
    End Sub

    Private Sub Button9_Click(sender As System.Object, e As System.EventArgs) Handles Button9.Click
        IOWin32.UnicodeWin32.Functions.FileExists_Win32(TextBox11.Text)

    End Sub

    Private Sub Button10_Click(sender As System.Object, e As System.EventArgs) Handles Button10.Click
        IOWin32.UnicodeWin32.Functions.DirExists_Win32(TextBox12.Text)

    End Sub

    Private Sub Button11_Click(sender As System.Object, e As System.EventArgs) Handles Button11.Click
        IOWin32.UnicodeWin32.Functions.DeleteDir_Win32(TextBox13.Text)

    End Sub
End Class