c++ - 如何让 EnumWindows 列出所有窗口？

Question

我假设，我问的实际上应该是默认的，但我遇到了一些我不理解的行为。

#include "stdafx.h"

using namespace std;

BOOL CALLBACK enumWindowsProc(
  __in  HWND hWnd,
  __in  LPARAM lParam
) {
  if( !::IsIconic( hWnd ) ) {
    return TRUE;
  }

  int length = ::GetWindowTextLength( hWnd );
  if( 0 == length ) return TRUE;

  TCHAR* buffer;
  buffer = new TCHAR[ length + 1 ];
  memset( buffer, 0, ( length + 1 ) * sizeof( TCHAR ) );
  
  GetWindowText( hWnd, buffer, length + 1 );
  tstring windowTitle = tstring( buffer );
  delete[] buffer;

  wcout << hWnd << TEXT( ": " ) << windowTitle << std::endl;

  return TRUE;
}

int _tmain( int argc, _TCHAR* argv[] ) {
  wcout << TEXT( "Enumerating Windows..." ) << endl;
  BOOL enumeratingWindowsSucceeded = ::EnumWindows( enumWindowsProc, NULL );
  cin.get();
  return 0;
}

如果我调用该代码，它将列出所有最小化的窗口:

现在，我不再只对最小化的窗口感兴趣，现在我想要所有的窗口。所以我删除了 IsIconic 检查:

BOOL CALLBACK enumWindowsProc(
  __in  HWND hWnd,
  __in  LPARAM lParam
) {
  /*
  if( !::IsIconic( hWnd ) ) {
    return TRUE;
  }
  */

  int length = ::GetWindowTextLength( hWnd );
  if( 0 == length ) return TRUE;

  TCHAR* buffer;
  buffer = new TCHAR[ length + 1 ];
  memset( buffer, 0, ( length + 1 ) * sizeof( TCHAR ) );
  
  GetWindowText( hWnd, buffer, length + 1 );
  tstring windowTitle = tstring( buffer );
  delete[] buffer;

  wcout << hWnd << TEXT( ": " ) << windowTitle << std::endl;

  return TRUE;
}

现在我得到所有窗口除了最小化的窗口(这次没有列出之前列出的窗口句柄):

为了完整性，这是stdafx.h:

#pragma once

#include "targetver.h"


#include <iostream>
#include <map>
#include <string>

namespace std {
  #if defined _UNICODE || defined UNICODE
    typedef wstring tstring;
  #else
    typedef string tstring;
  #endif
}

#include <stdio.h>
#include <tchar.h>
#include <Windows.h>
#include <psapi.h>

我做错了什么？

Answer 1

这是一个列出所有打开窗口的回调函数:

#include <string>
#include <iostream>
#include <Windows.h>

static BOOL CALLBACK enumWindowCallback(HWND hWnd, LPARAM lparam) {
    int length = GetWindowTextLength(hWnd);
    char* buffer = new char[length + 1];
    GetWindowText(hWnd, buffer, length + 1);
    std::string windowTitle(buffer);
    delete[] buffer;

    // List visible windows with a non-empty title
    if (IsWindowVisible(hWnd) && length != 0) {
        std::cout << hWnd << ":  " << windowTitle << std::endl;
    }
    return TRUE;
}

int main() {
    std::cout << "Enmumerating windows..." << std::endl;
    EnumWindows(enumWindowCallback, NULL);
    std::cin.ignore();
    return 0;
}

如果你想检查窗口是否最小化，你可以使用IsIconic() .

另请参阅:

• 微软:EnumWindows function
• 堆栈溢出:Getting a list of all open windows in c++ and storing them