这个VB代码为什么只能获得窗口内的名字而不能获得窗口外的

Private Declare Function GetWindowText Lib "user32" Alias "GetWindowTextA" (ByVal hwnd As Long, ByVal lpString As String, ByVal cch As Long) As Long
Private Declare Function ClientToScreen Lib "user32" (ByVal hwnd As Long, lpPoint As POINTAPI) As Long
Private Declare Function SetCapture Lib "user32" (ByVal hwnd As Long) As Long
Private Declare Function GetClassName Lib "user32" Alias "GetClassNameA" (ByVal hwnd As Long, ByVal lpClassName As String, ByVal nMaxCount As Long) As Long
Private Declare Function WindowFromPoint Lib "user32" (ByVal xPoint As Long, ByVal yPoint As Long) As Long
Private Type POINTAPI
x As Long
y As Long
End Type
Private Sub Form_MouseMove(Button As Integer, Shift As Integer, x As Single, y As Single)
Dim curwnd As Long
Dim mystr As String * 255
Dim mouse As POINTAPI
SetCapture Me.hwnd '设置当前

这个VB代码有问题吗，怎么只是一个窗口 VB 只知道进程ID,如何获得窗口句柄，来看看这个程序阿555555 谁知道这个VB代码为什么是这个结果 请教这个VB代码 VB这个代码是什么？ 这个VB 代码哪里不对 为什么不能用 这个Vb代码啥意思? access vb代码添加数据为什么一次最多只能插入234058条？急啊 VB中如何即时获得窗口大小信息 关于获得窗口句柄的问题 VB高手进