vb.net获取句柄函数 vba查找窗口句柄并获得标题
vb.net如何通过窗口句柄获取进程名
Imports System.Runtime.InteropServices
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Module winapi
DllImport("User32.dll", CallingConvention:=CallingConvention.StdCall, EntryPoint:="GetWindowThreadProcessId") _
Function GetWindowThreadProcessId(ByVal hwnd As IntPtr, ByRef procId As UInt32) As UInt32
End Function
DllImport("kernel32.dll", CallingConvention:=CallingConvention.StdCall, EntryPoint:="OpenProcess") _
Function OpenProcess(ByVal access As UInt32, ByVal inherit As Boolean, ByVal procid As UInt32) As IntPtr
End Function
DllImport("kernel32.dll", CallingConvention:=CallingConvention.StdCall, EntryPoint:="CloseHandle") _
Function CloseHandle(ByVal handle As IntPtr) As Boolean
End Function
DllImport("psapi.dll", CallingConvention:=CallingConvention.StdCall, EntryPoint:="GetModuleFileNameExW", Charset:=CharSet.Unicode) _
Function GetModuleFileNameExW(ByVal hProc As IntPtr, ByVal hMod As IntPtr, ByVal arrName() As Char, ByVal arrSize As UInt32) As UInt32
End Function
End Module
Public Class Form1
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Dim procid As UInt32
GetWindowThreadProcessId(Me.Handle, procid)
Dim handle As IntPtr
handle = OpenProcess(1040, False, procid)
Dim name(65536) As Char
Dim nameSize As UInt32 = GetModuleFileNameExW(handle, IntPtr.Zero, name, 65536)
Dim strName As String = New String(name, 0, nameSize)
CloseHandle(handle)
MsgBox(strName)
End Sub
End Class
可恶……我不会vb……临时去七拼八凑查了点语法……尽力了
vb.net 如何通过访问内存的方式，获取到另一个程序窗体中某个textbox中的内容。
vb.net 根本就访问不了内存，只能通过调用api函数方式，不光是vb.net ，C#也是，主要是为了安全，微软在net里面不容许直接访问内存。
求vb.net句柄实例，实现操作其他程序窗口。如我给的例子
Imports System.Text
Imports System.Runtime.InteropServices
Public Class Form1
' 相关API函数声明,注释掉的这里没用到，但是也比较常用吧，这些函数的功能都能搜到。
Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As IntPtr
Private Declare Function FindWindowEx Lib "user32" Alias "FindWindowExA" (ByVal hWnd1 As IntPtr, ByVal hWnd2 As IntPtr, ByVal lpsz1 As String, ByVal lpsz2 As String) As IntPtr
Private Delegate Function EnumChildProc(ByVal hWnd As IntPtr, ByVal lParam As Integer) As Boolean
Private Declare Function EnumChildWindows Lib "user32.dll" (ByVal hWndParent As IntPtr, ByVal lpEnumFunc As EnumChildProc, ByVal lParam As Integer) As Boolean
Private Declare Auto Function SendMessage Lib "User32.dll" (ByVal hWnd As IntPtr, ByVal Msg As Integer, ByVal wParam As Integer, ByVal lParam As String) As Integer
'Private Declare Function CheckDlgButton Lib "user32" Alias "CheckDLGButtonA" (ByVal hDlg As IntPtr, ByVal nIDButton As IntPtr, ByVal wCheck As Integer) As Integer
Private Declare Function GetClassName Lib "user32" Alias "GetClassNameA" (ByVal hWnd As IntPtr, ByVal lpClassName As StringBuilder, ByVal nMaxCount As Integer) As Integer
'Private Declare Function GetWindowThreadProcessId Lib "user32" Alias "GetWindowThreadProcessId" (ByVal hwnd As IntPtr, ByVal lpdwProcessId As Long) As Integer
Private Declare Auto Function GetWindowTextLength Lib "user32" Alias "GetWindowTextLength" (ByVal hwnd As IntPtr) As Integer
Private Declare Function GetWindowText Lib "user32" Alias "GetWindowTextA" (ByVal hwnd As IntPtr, ByVal lpString As StringBuilder, ByVal cch As Integer) As Integer
' 相关消息定义，也有没用到的
Const WM_SETTEXT = HC
Const WM_GETTEXT = HD
'Const WM_SETFOCUS = H7
'Const WM_KILLFOCUS = H8
'Const WM_CLOSE = H10
'Const WM_SYSCOMMAND = H112
'Const SC_CLOSE = HF060
'Const SC_MINIMIZE = HF020
Const BM_GETCHECK = HF0
Const BM_SETCHECK = HF1
Const BM_GETSTATE = HF2
Const BM_SETSTATE = HF3
Const BM_SETSTYLE = HF4
Const BM_CLICK = HF5
'Const BM_GETIMAGE = HF6
'Const BM_SETIMAGE = HF7
Const BST_UNCHECKED = O0
Const BST_CHECKED = O1
Const BST_INDETERMINATE = O2
' 储存窗口句柄
Dim WindowHandle As IntPtr
' 储存两个（或者多个）编辑框句柄
Dim EditHandle As New List(Of IntPtr)
Dim EditWindowsText As List(Of String)
' 储存复选框句柄
Dim CheckHandle As IntPtr = 0
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Button1_Click(sender, e)
End Sub
' EnumChildWindows 回调函数，该函数名作为API函数EnumChildWindows 的一个参数
' 该函数实现了枚举各个子窗口，找出编辑框属性的功能
Public Function EnumChildProcC(ByVal hwnd As IntPtr, ByVal lParam As Integer) As Boolean
Dim dwWindowClass As StringBuilder = New StringBuilder(100)
' 获得某一个句柄的类名
GetClassName(hwnd, dwWindowClass, 100)
If dwWindowClass.ToString.Contains("EDIT") Or dwWindowClass.ToString.Contains("Edit") Then ' 类名包含EDIT的为编辑框
EditHandle.Add(hwnd) ' 存储该句柄
End If
' 返回 True 一直枚举完
Return True
End Function
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
WindowHandle = FindWindow(vbNullString, "登陆")
If WindowHandle.ToInt32 = 0 Then
MsgBox("未捕获到窗口" + "登陆")
Return
End If
' 枚举所有主窗口的子窗口（控件），枚举时自动调用回调函数，完成编辑框句柄的获取
EnumChildWindows(WindowHandle, AddressOf EnumChildProcC, 0)
' 寻找复选框
CheckHandle = FindWindowEx(WindowHandle, IntPtr.Zero, vbNullString, "记住密码")
Dim str As New StringBuilder
Dim j As Integer = 0
' 对编辑框文本赋值
For j = 0 To EditHandle.Count - 1
SendMessage(EditHandle(j), WM_SETTEXT, 0, "Text")
'GetWindowText(EditHandle(j), str, 20)
'EditWindowsText.Add(Str.ToString)
'Str.Clear()
Next
If EditHandle.Count = 0 Then
MsgBox("未找到输入框！")
End If
If CheckHandle.ToInt32 0 Then
'CheckDlgButton(WindowHandle, id, 1)
' 对复选框进行鼠标单击操作
SendMessage(CheckHandle, BM_CLICK, 0, 0)
'SendMessage(CheckHandle, BM_SETCHECK, True, 0)
End If
End Sub
End Class
VB已知窗口句柄获得其路径
Form1: TForm1;
implementation
{$R *.dfm}
uses PsAPI; {GetModuleFileNameEx 函数需要它}
{根据窗口句柄获取所在程序路径的函数}
function GetProcessExePath(h: HWND): string;
var
pid: Cardinal;
pHandle: THandle;
buf: array[0..MAX_PATH] of Char;
begin
{先获取进程 ID}
GetWindowThreadProcessId(h, @pid);
{再获取进程句柄}
pHandle := OpenProcess(PROCESS_ALL_ACCESS, False, pid);
{获取进程路径}
GetModuleFileNameEx(pHandle, 0, buf, Length(buf));
CloseHandle(pHandle);
Result := buf;
end;
{测试当前程序}
procedure TForm1.Button1Click(Sender: TObject);
var
path: string;
begin
path := GetProcessExePath(Handle);
ShowMessage(path);
end;
{测试记事本 - 需要随便打开一个记事本}
procedure TForm1.Button2Click(Sender: TObject);
var
wh: HWND;
path: string;
begin
wh := FindWindow('Notepad', nil);
path := GetProcessExePath(wh);
ShowMessage(path);
end;
end.
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