Private Const HTCAPTION As Long = 2&
Private Const WM_NCLBUTTONDOWN As Long = &HA1&

Private Declare Sub ReleaseCapture Lib "User32" ()
Private Declare Function SendMessage Lib "User32" Alias "SendMessageA" (ByVal hWnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long



Private Sub Form_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
If Button And vbLeftButton Then
ReleaseCapture
SendMessage Me.hWnd, WM_NCLBUTTONDOWN, HTCAPTION, 0&
End If
End Sub