frm2_1.frm

是API教程2

VERSION 5.00
Begin VB.Form Form1 
   BackColor       =   &H00C0C0C0&
   Caption         =   "Form1"
   ClientHeight    =   1560
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   5550
   LinkTopic       =   "Form1"
   ScaleHeight     =   1560
   ScaleWidth      =   5550
   StartUpPosition =   3  'Windows Default
   Begin VB.Timer Timer1 
      Interval        =   100
      Left            =   240
      Top             =   1080
   End
   Begin VB.Label Label1 
      Alignment       =   2  'Center
      BackColor       =   &H00C0C0C0&
      Caption         =   "Label1"
      Height          =   735
      Left            =   60
      TabIndex        =   0
      Top             =   300
      Width           =   5355
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False

Option Explicit
Private Declare Function GetWindowText& Lib "user32" Alias "GetWindowTextA" _
           (ByVal hwnd As Long, ByVal lpString As String, ByVal cch As Long)
Private Declare Function GetForegroundWindow& Lib "user32" ()


Private Sub Timer1_Timer()
       Dim dl As Long
       Dim MyHwnd As Long
       Dim MyCaption As String
       MyCaption = Space(256)
       
       MyHwnd& = GetForegroundWindow()
       dl& = GetWindowText(MyHwnd, MyCaption, 255)
       Label1.Caption = "您点了" & MyCaption
       
       
End Sub