OICQ聊天时的窗体自动隐藏功能，用VC 或CBC都可以很简单地实现，前几天看到有一则用CBC实现的例子，便想用VB实现一下，可惜当窗体上放满控件时，FORM的MOUSEMOVE事件不能很好地触发，所以只好用以下的笨办法，现把代码贴上，窗体上需放一TIMER控件，Interval属性为200。大伙如有好的意见，不妨贴出来，让我学习学习。
Option Explicit
Private Declare Function GetCursorPos Lib "user32" (lpPoint As POINTAPI) As Long
Private Declare Function GetWindowRect Lib "user32" (ByVal hwnd As Long, lpRect As RECT) As Long
Private Declare Function SetWindowPos Lib "user32" (ByVal hwnd As Long, ByVal hWndInsertAfter As Long, ByVal X As Long, ByVal Y As Long, ByVal cx As Long, ByVal cy As Long, ByVal wFlags As Long) As Long
Private Type RECT
Left As Long
Top As Long
Right As Long
Bottom As Long
End Type
Private Type POINTAPI
X As Long
Y As Long
End Type
Private Const HWND_TOPMOST = -1
Private Const SWP_NOSIZE = &H1
Private Const SWP_NOMOVE = &H2
Private Const HWND_TOP = 0
Private Const SWP_NOACTIVATE = &H10
Private Const SWP_SHOWWINDOW = &H40
Private Sub Form_Load()
'窗体放在最前面
SetWindowPos Me.hwnd, HWND_TOPMOST, 0, 0, 0, 0, SWP_SHOWWINDOW Or SWP_NOMOVE Or SWP_NOSIZE
End Sub
Private Sub Timer1_Timer()
Dim p As POINTAPI
Dim f As RECT
GetCursorPos p '得到MOUSE位置
GetWindowRect Me.hwnd, f '得到窗体的位置
If Me.WindowState <> 1 Then
If p.X > f.Left And p.X < f.Right And p.Y > f.Top And p.Y < f.Bottom Then
'MOUSE 在窗体上
If Me.Top < 0 Then
Me.Top = -10
Me.Show
ElseIf Me.Left < 0 Then
Me.Left = -10
Me.Show
ElseIf Me.Left + Me.Width >= Screen.Width Then
Me.Left = Screen.Width - Me.Width + 10
Me.Show
End If
Else
If f.Top <= 4 Then
Me.Top = 40 - Me.Height
ElseIf f.Left <= 4 Then
Me.Left = 40 - Me.Width
ElseIf Me.Left + Me.Width >= Screen.Width - 4 Then
Me.Left = Screen.Width - 40
End If
End If
End If
End Sub 
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