我们一般是用鼠标按住窗口的标题栏，然后移动窗口，当窗口没有标题栏时，我们可以用下面的方法来移动窗口：

在 BAS 文件中声明：

Declare Function ReleaseCapture Lib "user32" () As Long

Declare Function SendMessage Lib "user32" _

Alias "SendMessageA" ( _

ByVal hwnd As Long, ByVal wMsg As Long, _

ByVal wParam As Long, lParam As Any) As Long

Public Const HTCAPTION = 2

Public Const WM_NCLBUTTONDOWN = &HA1

然后，在 Form_MouseDown 事件中：

Private Sub Form_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)

ReleaseCapture

SendMessage hwnd, WM_NCLBUTTONDOWN, HTCAPTION, 0&

End Sub