DLLImport vs DinamicInvoke or Method.Invoke in VB.NET - vb.net

Question

I want to call function MoveFile from "Kernel32.dll".
1)First approach:
Imports System.Runtime.InteropServices
Public Class Form1
<DllImport("KERNEL32.DLL", EntryPoint:="MoveFileW", SetLastError:=True, CharSet:=CharSet.Unicode, ExactSpelling:=True, CallingConvention:=CallingConvention.StdCall)>
Public Shared Function MoveFile(ByVal src As String, ByVal dst As String) As Boolean
End Function
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Dim src As String = "C:\Users\Baha1990\Documents\Visual Studio 2017\Projects\WindowsApp1\TEST FILE\1\MSACCESS.accdb"
Dim dst As String = "C:\Users\Baha1990\Documents\Visual Studio 2017\Projects\WindowsApp1\TEST FILE\2\MSACCESS.accdb"
Dim RetVal As Boolean = MoveFile(src, dst)
End Sub
End Class
It works pretty well
Second approach:
Imports System.Runtime.InteropServices
Public Class Form1
<Runtime.InteropServices.DllImport("kernel32.dll", SetLastError:=True)> Private Shared Function LoadLibrary(ByVal lpFileName As String) As IntPtr
End Function
<Runtime.InteropServices.DllImport("kernel32.dll", SetLastError:=True, CharSet:=Runtime.InteropServices.CharSet.Ansi, ExactSpelling:=True)> Private Shared Function GetProcAddress(ByVal hModule As IntPtr, ByVal procName As String) As IntPtr
End Function
<UnmanagedFunctionPointer(CallingConvention.StdCall)>
Public Delegate Function _MoveFile(ByVal src As String, ByVal dst As String) As Boolean
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Dim src As String = "C:\Users\Baha1990\Documents\Visual Studio 2017\Projects\WindowsApp1\TEST FILE\1\MSACCESS.accdb"
Dim dst As String = "C:\Users\Baha1990\Documents\Visual Studio 2017\Projects\WindowsApp1\TEST FILE\2\MSACCESS.accdb"
Dim pDll As IntPtr = IntPtr.Zero
pDll = LoadLibrary("kernel32.dll")
Dim pProc2D = GetProcAddress(pDll, "MoveFileW")
Dim MoveFile = Marshal.GetDelegateForFunctionPointer(pProc2D, GetType(_MoveFile))
Dim RetVal = MoveFile.DynamicInvoke(src, dst) 'Here I get boolean as false it should be true
or
Dim RetVal = MoveFile.Method.Invoke(What to pass here in my case?)
End Sub
End Class
So Question: What is difference between DLLImport and DynamicInvoke or Method.Invoke, and why I have fail with DynamicInvoke and what params to pass to Method.Invoke?
Ok, in second approach I figure out that in this line:
<UnmanagedFunctionPointer(CallingConvention.StdCall)>
Needs additional params, after I edited as:
<UnmanagedFunctionPointer(CallingConvention.StdCall, SetLastError:=True, CharSet:=CharSet.Unicode)>
Dim RetVal = MoveFile.DynamicInvoke(src, dst) - DynamicInvoke works perfect.
So question what to pass as params to Method.Invoke still open.
Ok, I also figured out about Method.Invoke:
Dim param = {src, dst}
Dim RetVal = MoveFile.Method.Invoke(MoveFile, param) - works perfect.
So seems all three aproach works and gives same result, but what advantage gives these methods between each other. Who can explain?