Installscript：如何关闭资源管理器窗口而不重新启动explorer.exe进程？

Question

有没有办法关闭所有资源管理器窗口而不重新启动explorer.exe进程？

上下文：- 在卸载基于 installshield 的安装程序期间，我必须删除一个用于显示文件右键单击上下文菜单的 dll。在卸载过程中，我必须删除该 dll。不幸的是它被explorer.exe锁定了。

有没有办法只关闭资源管理器窗口而不重新启动explorer.exe进程？

Answer 1

在谷歌搜索了这么多的线索之后，我可以想出以下 C++ 程序，它只关闭资源管理器窗口，而无需重新启动 explorer.exe 进程。

这里我使用 EnumWindows 并迭代所有窗口，并根据窗口的类名仅关闭资源管理器窗口。

#include "stdafx.h"
#include <iostream>
#include <fstream>
using  namespace std;

wofstream myfile;

BOOL CALLBACK enumWindowsProc(
  __in  HWND hWnd,
  __in  LPARAM lParam
) {


  int length = 255;

  TCHAR* buffer,*buffer1;
  buffer = new TCHAR[ length + 1 ];
  buffer1 = new TCHAR[ length + 1 ];
  memset( buffer, 0, ( length + 1 ) * sizeof( TCHAR ) );
  memset( buffer1, 0, ( length + 1 ) * sizeof( TCHAR ) );

  DWORD pid;
  DWORD dwThreadID = ::GetWindowThreadProcessId( hWnd, &pid);

  ::GetWindowText(hWnd,buffer,length +1);
  wstring windowTitle = wstring( buffer );
  delete[] buffer;

  //cout << windowTitle.c_str();
  ::GetClassName(hWnd,buffer1,length +1);
  wstring windowClass = wstring( buffer1 );
  delete[] buffer1;

  if(windowClass.compare(L"CabinetWClass") == 0 || windowClass.compare(L"ExploreWClass") == 0)
  {
      //::PostMessage(hWnd, WM_ENDSESSION, MAKEWORD(true,1), ENDSESSION_CLOSEAPP);
      //::PostMessage(hWnd, 0x5B4, 0, 0);
      PostMessage(hWnd,WM_CLOSE,0,0);
  }

  myfile << windowTitle.c_str();
  myfile << L"|" ;
  myfile << pid ;
  myfile << L"|" ;
  myfile << windowClass.c_str() ;
  myfile << L"\n" ;

  return TRUE;
}

int APIENTRY _tWinMain(HINSTANCE hInstance,
                       HINSTANCE hPrevInstance,
                       LPTSTR    lpCmdLine,
                       int       nCmdShow)
{
    myfile.open ("processes.txt");
    BOOL enumeratingWindowsSucceeded = ::EnumWindows( enumWindowsProc, NULL );
    cin.get();
    myfile.close();
    return 0;
}

Answer 2

我确信您可以调用 FindWindow 并使用 SendMessage 来关闭资源管理器窗口，但 explorer.exe 进程仍将运行，并且您仍将拥有文件锁定。

Windows Installer 可以在重新启动时删除锁定的文件。如果您不想重新启动，则必须杀死并重新启动资源管理器。

据我所知，这里没有其他模式。

WM_SYSCOMMAND 消息

来自 InstallScript 语言参考的 FindWindow 示例：

/*--------------------------------------------------------------*\
*
* InstallShield Example Script
*
* Demonstrates the FindWindow and SendMessage functions.
*
* This script launches Windows Notepad and then calls
* FindWindow to locate the Notepad window.  Next, it calls
* SendMessage to maximize the window;  after a three-second
* delay, it calls SendMessage again to minimize the
* window.   When the script ends, Windows NotePad remains
* open but minimized.  Note that the parameters passed to
* SendMessage are Windows system messages whose values
* are defined as constants in this script.
*
* Note: Before running this script, set the preprocessor
*       constant NOTEPAD so that it references the fully-
*       qualified name of the Windows Notepad executable.
*
\*--------------------------------------------------------------*/
 
#define NOTEPAD "C:\\Windows\\Notepad.exe"
 
// Include Ifx.h for built-in InstallScript function prototypes.
#include "Ifx.h"
 
export prototype ExFn_FindWindow(HWND);
 
function ExFn_FindWindow(hMSI)
    NUMBER nMsg, nwParam, nlParam;
    HWND nHwnd;
begin
 
    // Do not display the setup's background window.
    Disable (BACKGROUND);
 
    // Open the Windows Notepad.
    if (LaunchApp (NOTEPAD, "") < 0 ) then
        MessageBox ("Unable to launch Notepad.", SEVERE);
        abort;
    endif;
 
    // Wait three seconds so we can view the window before
    // it's maximized.
    Delay (3);
 
    // Retrieve the handle of the Notepad window.  The first
    // parameter is the window class.  A null string in the
    // second parameter specifies the topmost Notepad window.
    nHwnd = FindWindow ("NotePAD", "");
 
    if (nHwnd = NULL) then
        MessageBox ("Unable to find the Notepad window.", SEVERE);
    else
        // Send system command to maximize the window.
        SendMessage (nHwnd, WM_SYSCOMMAND, SC_MAXIMIZE, 0);
 
        // Wait three seconds so we can view the window
        // before it's minimized.
        Delay (3);
 
        // Send system command to minimize the window.
        SendMessage (nHwnd, WM_SYSCOMMAND, SC_MINIMIZE, nlParam);
    endif;
 
end;