設定Mouse 在某個固定范圍

Type RECT
　　　　Left As Long
　　　　Top As Long
　　　　Right As Long
　　　　Bottom As Long
End Type
Declare Function ClipCursor Lib "user32" (lpRect As Any) As Long
Declare Function ShowCursor Lib "user32" (ByVal bShow As Long) As Long
Declare Function SetCursorPos Lib "user32" (ByVal x As Long, _
　　　　ByVal y As Long) As Long
Declare Function GetWindowRect Lib "user32" Alias "GetWindowRect" _
　　　　(ByVal hwnd As Long, lpRect As RECT) As Long
'設定Mouse可移動的圍是在某個control項之內
Public Function toLockCursor(ByVal ctlHwnd As Long) As Boolean
Dim rect5 As RECT
Dim res As Long
GetWindowRect ctlHwnd, rect5 '取得window的四個角
rect5.Top = rect5.Top
rect5.Left = rect5.Left
rect5.Bottom = rect5.Bottom
rect5.Right = rect5.Right
SetCursorPos (rect5.Top + rect5.Bottom) \ 2, (rect5.Left + rect5.Right) \ 2
res = ClipCursor(rect5)
If res = 1 Then
　 toLockCursor = True
Else
　 toLockCursor = False
End If
End Function
'設定Mouse移動的圍為個螢幕
Public Sub toUnLockCursor()
Dim rscreen As RECT
rscreen.Top = 0
rscreen.Left = 0
rscreen.Right = Screen.Width \ Screen.TwipsPerPixelX
rscreen.Bottom = Screen.Height \ Screen.TwipsPerPixelY
ClipCursor rscreen
End Sub
例如：設定Mouse只能在Form的范圍
Private Sub Command1.Click()
Call toLockCursor(Me.hWnd)
End Sub
Private Sub Command2.Click()
Call toUnLockCursor()
End Sub