Private Declare Function FreeLibrary Lib "kernel32" (ByVal hLibModule As Long) As Long
Private Declare Function LoadLibrary Lib "kernel32" Alias "LoadLibraryA" (ByVal lpLibFileName As String) As Long
Private Declare Function GetProcAddress Lib "kernel32" (ByVal hModule As Long, ByVal lpProcName As String) As Long
Private Declare Function CallWindowProc Lib "user32" Alias "CallWindowProcA" (ByVal lpPrevWndFunc As Long, ByVal hWnd As Long, ByVal Msg As Any, ByVal wParam As Any, ByVal lParam As Any) As Long
Private Sub Form_Load()
    On Error Resume Next
    'KPD-Team 1999
    'URL: http://www.allapi.net/
    'E-Mail: KPDTeam@Allapi.net
    'We're going to call an API-function, without declaring it!
    Dim lb As Long, pa As Long
    'map 'user32' into the address space of the calling process.
    lb = LoadLibrary("user32")
    'retrieve the address of 'SetWindowTextA'
    pa = GetProcAddress(lb, "SetWindowTextA")
    'Call the SetWindowTextA-function
    CallWindowProc pa, Me.hWnd, "Hello !", ByVal 0&, ByVal 0&
    'unmap the library's address
    FreeLibrary lb
End Sub

CallWindowProc pa, Me.hWnd, "Hello !", ByVal 0&, ByVal 0&

Private Type AAA
A1 As Integer
A2 As Integer
A3 As Long
A4 As String
End Type
 
Private Sub Form_Load()
Dim A0 As AAA
Dim dir As Long
 
A0.A2 = 20
 
dir = VarPtr(A0)
dir = dir + 2
 
Debug.Print dir
 
End Sub
 

                  AAA
   A1    A2   A3   A4
|XXXX|XXXX|XXXXXXX|XX|

Private Sub Form_Load()
Dim AAA As Integer
 
AAA = 50
 
BBB (AAA)
Debug.Print AAA
End Sub
 
 
Sub BBB(ByRef X As Integer)
X = X + 50
End Sub