VB挂机锁问题

①鼠标位置设置函数，下述参数a_RestrictObject是限制对象，可以是窗体，也可以是窗体上的任意控件。
Public Sub SetRestrict(ByRef a_RestrictObject As Object)
Dim r As RECT
On Error Resume Next
GetWindowRect (a_RestrictObject.hwnd), r
If Err.Number = 0 Then
Call ClipCursor(lpRect)
End If
End Sub

②鼠标位置解除函数，即接触对鼠标位置的限制
Public Sub RemoveRestrict()
Dim lResult As Long
Dim RT_ScreenArea As RECT
With RT_ScreenArea
.Top = 0
.Left = 0
.Bottom = Screen.Height \ Screen.TwipsPerPixelX
.Right = Screen.Width \ Screen.TwipsPerPixelY
End With
lResult = ClipCursor(RT_ScreenArea)
End Sub

③函数1，2所用到的API。
Public Declare Function GetWindowRect Lib "user32" (ByVal hwnd As Long, lpRect As RECT) As Long
Public Declare Function ClipCursor Lib "user32" (lpRect As Any) As Long

④注意点，上述函数1，不要随意使用，使用后，要用函数2解除，如不接触，
函数1所造成的鼠标移动