delphi 如何获取其它应用程序窗体中的所有控件句柄

实现原理是启动一个应用程序，通过ProcessID得到窗体句柄，然后对其设定父窗体句柄为本程序某控件句柄(本例是窗体内一个Panel的句柄)，这样就达成了内嵌的效果。

新建窗体，上面放置一个Panel控件，名为pnlApp，然后按下面代码编写：

unit frmTestEmbedApp

interface

uses

Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

Dialogs, ExtCtrls

type

TForm1 = class(TForm)

pnlApp: TPanel

procedure FormCreate(Sender: TObject)

procedure FormClose(Sender: TObjectvar Action: TCloseAction)

procedure FormResize(Sender: TObject)

private

{ Private declarations }

public

{ Public declarations }

end

var

Form1: TForm1

hWin: HWND = 0

implementation

{$R *.dfm}

type

// 存储窗体信息

PProcessWindow = ^TProcessWindow

TProcessWindow = record

ProcessID: Cardinal

FoundWindow: hWnd

end

// 窗体枚举函数

function EnumWindowsProc(Wnd: HWNDProcWndInfo: PProcessWindow): BOOLstdcall

var

WndProcessID: Cardinal

begin

GetWindowThreadProcessId(Wnd, @WndProcessID)

if WndProcessID = ProcWndInfo^.ProcessID then begin

ProcWndInfo^.FoundWindow := Wnd

Result := False // 已找到，故停止 EnumWindows

end

else

Result := True// 继续查找

end

// 由 ProcessID 查找窗体 Handle

function GetProcessWindow(ProcessID: Cardinal): HWND

var

ProcWndInfo: TProcessWindow

begin

ProcWndInfo.ProcessID := ProcessID

ProcWndInfo.FoundWindow := 0

EnumWindows(@EnumWindowsProc, Integer(@ProcWndInfo))// 查找窗体

Result := ProcWndInfo.FoundWindow

end

// 在 Panel 上内嵌运行程序

function RunAppInPanel(const AppFileName: stringParentHandle: HWNDvar WinHandle: HWND): Boolean

var

si: STARTUPINFO

pi: TProcessInformation

begin

Result := False

// 启动进程

FillChar(si, SizeOf(si), 0)

si.cb := SizeOf(si)

si.wShowWindow := SW_SHOW

if not CreateProcess(nil, PChar(AppFileName), nil, nil, true,

CREATE_NEW_CONSOLE or NORMAL_PRIORITY_CLASS, nil, nil, si, pi) then Exit

// 等待进程启动

WaitForInputIdle(pi.hProcess, 10000)

// 取得进程的 Handle

WinHandle := GetProcessWindow(pi.dwProcessID)

if WinHandle >0 then begin

// 设定父窗体

Windows.SetParent(WinHandle, ParentHandle)

// 设定窗体位置

SetWindowPos(WinHandle, 0, 0, 0, 0, 0, SWP_NOSIZE or SWP_NOZORDER)

// 去掉标题栏

SetWindowLong(WinHandle, GWL_STYLE, GetWindowLong(WinHandle, GWL_STYLE)

and (not WS_CAPTION) and (not WS_BORDER) and (not WS_THICKFRAME))

Result := True

end

// 释放 Handle

CloseHandle(pi.hProcess)

CloseHandle(pi.hThread)

end

procedure TForm1.FormClose(Sender: TObjectvar Action: TCloseAction)

begin

// 退出时向内嵌程序发关闭消息

if hWin >0 then PostMessage(hWin, WM_CLOSE, 0, 0)

end

procedure TForm1.FormCreate(Sender: TObject)

const

App = 'C:\Windows\Notepad.exe'

begin

pnlApp.Align := alClient

// 启动内嵌程序

if not RunAppInPanel(App, pnlApp.Handle, hWin) then ShowMessage('App not found')

end

procedure TForm1.FormResize(Sender: TObject)

begin

// 保持内嵌程序充满 pnlApp

if hWin <>0 then MoveWindow(hWin, 0, 0, pnlApp.ClientWidth, pnlApp.ClientHeight, True)

end

end.

纠正你一下，得知路径是获取不了目标进程的句柄的。通过API函数 OPENPROCESS 可以获取进程的句柄，不过要注意的是，进程句柄不一定是窗口的句柄，好好理解这句话。HANDLE hProcess = OpenProcess( PROCESS_ALL_ACCESS, FALSE, pID ) hProcess //进程句柄pID //进程ID 如果你想取某个窗口句柄的话，最好不要通过进程ID转换的方式，这会让你离目标越来越远。

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