Advanced Windows APIs conversion with refactoring

Redundant API declarations will be converted to a single declaration, in an API declarations project

All uses of these APIs will be redirected to this single declaration

The VBUC creates a wrapper for each unmanaged API declaration.

Wrapper allows for easy replacement of unmanaged APIs

This refactoring functionality will produce more readable and maintainable code

VB6 Code

Private Declare Function GetWindowText Lib "user32" Alias "GetWindowTextA" (ByVal hwnd As Long, ByVal lpString As String, ByVal cch As Long) As Long
Private Declare Function GetWindowTextLength Lib "user32" Alias "GetWindowTextLengthA" (ByVal hwnd As Long) As Long
Private Sub Command1_Click()
    Dim titleForm1 As String
    titleForm1 = String(GetWindowTextLength(Me.hwnd) + 1, Chr$(0))
    GetWindowText Me.hwnd, titleForm1, Len(titleForm1)
End Sub

.NET Code

File: user32.cs (safe methods)
public static class user32
{
   public static int GetWindowText( int hwnd, ref  string lpString,  int cch) {
       return WinAPI.UnsafeNative.user32.GetWindowText(hwnd, ref lpString, cch);
   }
   public static int GetWindowTextLength( int hwnd)      {
       return WinAPI.UnsafeNative.user32.GetWindowTextLength(hwnd);
   }
}

File: user32.cs (usafe methods)
[System.Security.SuppressUnmanagedCodeSecurity]
public static class user32
{
     [DllImport("user32.dll", EntryPoint = "GetWindowTextA", CharSet = CharSet.Ansi, SetLastError = 
     true, ExactSpelling = true)]
     extern public static int GetWindowText( int hwnd, [MarshalAs(UnmanagedType.VBByRefStr)] ref  
     string lpString,  int cch);
     [DllImport("user32.dll", EntryPoint = "GetWindowTextLengthA", CharSet = CharSet.Ansi, 
     SetLastError = true, ExactSpelling = true)]
extern public static int GetWindowTextLength( int hwnd);
}

File: Form1.cs
private void  Command1_Click( Object eventSender,  EventArgs eventArgs)
{
       string titleForm1 = new string(Strings.Chr(0), GetWindowTextLength(this.Handle.ToInt32()) + 1);
       GetWindowText(this.Handle.ToInt32(), ref titleForm1, titleForm1.Length);
}