C# Definition:

enum WindowLongFlags : int
{
     GWL_EXSTYLE = -20,
     GWLP_HINSTANCE = -6,
     GWLP_HWNDPARENT = -8,
     GWL_ID = -12,
     GWL_STYLE = -16,
     GWL_USERDATA = -21,
     GWL_WNDPROC = -4,
     DWLP_USER = 0x8,
     DWLP_MSGRESULT = 0x0,
     DWLP_DLGPROC = 0x4
}

VB.NET Definition:

Public enum WindowLongFlags As Integer
     GWL_EXSTYLE = -20
     GWLP_HINSTANCE = -6
     GWLP_HWNDPARENT = -8
     GWL_ID = -12
     GWL_STYLE = -16
     GWL_USERDATA = -21
     GWL_WNDPROC = -4
     DWLP_USER = &H8
     DWLP_MSGRESULT = &H0
     DWLP_DLGPROC = &H4
end enum

VB Definition:

Public enum WindowLongFlags
     GWL_EXSTYLE As Long = -20
     GWLP_HINSTANCE As Long = -6
     GWLP_HWNDPARENT As Long = -8
     GWL_ID As Long = -12
     GWL_STYLE As Long = -16
     GWL_USERDATA As Long = -21
     GWL_WNDPROC As Long = -4
     DWLP_USER As Long = &H8
     DWLP_MSGRESULT As Long = &H0
     DWLP_DLGPROC As Long = &H4
end enum

Notes:

None.