(窗体中一个timer，两个label)
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 Declare Function GetCursorPos Lib "user32" (lpPoint As POINTAPI) As Long
Private Declare Function WindowFromPointXY Lib "user32" Alias "WindowFromPoint" (ByVal xPoint As Long,ByVal yPoint As Long) As Long
Private Declare Function GetForegroundWindow Lib "user32" () As Long
Private Declare Function GetFocus Lib "user32" () As Long
Private Declare Function EnumChildWindows Lib "user32" (ByVal hWndParent As Long,ByVal lpEnumFunc As Long,ByVal lParam 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 GetWindowThreadProcessId Lib "user32" (ByVal hwnd As Long,lpdwProcessId As Long) As Long
Private Declare Function AttachThreadInput Lib "user32" (ByVal idAttach As Long,ByVal idAttachTo As Long,ByVal fAttach As Long) As Long
Private Type POINTAPI
x As Long
y As Long
End Type
Private Sub Form_Load()
SetWindowPos Me.hwnd,-1,240,100,conSwpNoActivate Or conSwpShowWindow
End Sub
Private Sub Timer1_Timer()
Dim xy As POINTAPI
Dim ahwnd As Long
GetCursorPos xy
ahwnd = WindowFromPointXY(xy.x,xy.y)
Label1.Caption = "鼠标所在的控件类型：" & ClassName(ahwnd)
Label2.Caption = "获得焦点的控件类型：" & ClassName(GetHwnd)
End Sub
Public Function GetHwnd() As Long
Dim hwnd As Long
Dim PID As Long
Dim TID As Long
Dim hWndFocus As Long
hwnd = GetForegroundWindow
If hwnd Then
TID = GetWindowThreadProcessId(hwnd,PID)
AttachThreadInput App.ThreadID,TID,True
GetHwnd = GetFocus
AttachThreadInput App.ThreadID,False
End If
End Function
Private Function ClassName(nHwnd As Long) As String
Dim str As String
str = Space(255)
GetClassName nHwnd,str,255
ClassName = str
End Function
