问题
I'm working on a windows shell extension, and unfortunately, when making changes to the DLL, I must restart windows explorer (since it keeps the DLL in memory).
I found this program from Dino Esposito, but it doesn't work for me.
void SHShellRestart(void)
{
HWND hwnd;
hwnd = FindWindow("Progman", NULL );
PostMessage(hwnd, WM_QUIT, 0, 0 );
ShellExecute(NULL, NULL, "explorer.exe", NULL, NULL, SW_SHOW );
return;
}
Does any one have something they can share to do this?
P.S. I realize that I can go to task manager and kill the explorer process, but I just want to do it the lazy way. Besides, this enables automation.
P.P.S I am using .NET for the development, but the shell restart functionality could be in C, C++ or a .NET language. It will simply be a small stand-alone executable.
回答1:
A fool-proof solution:
foreach (Process p in Process.GetProcesses())
{
// In case we get Access Denied
try
{
if (p.MainModule.FileName.ToLower().EndsWith(":\\windows\\explorer.exe"))
{
p.Kill();
break;
}
}
catch
{ }
}
Process.Start("explorer.exe");
回答2:
After parsing some of the earlier answers and doing a bit of research, I've created a little complete example in C#. This closes the explorer shell then waits for it to completely shut down and restarts it. Hope this helps, there's a lot of interesting info in this thread.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
using System.Diagnostics;
using System.Threading;
namespace RestartExplorer
{
class Program
{
[DllImport("user32.dll", SetLastError = true)]
static extern bool PostMessage(IntPtr hWnd, [MarshalAs(UnmanagedType.U4)] uint Msg, IntPtr wParam, IntPtr lParam);
[DllImport("user32.dll", SetLastError = true)]
static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
const int WM_USER = 0x0400; //http://msdn.microsoft.com/en-us/library/windows/desktop/ms644931(v=vs.85).aspx
static void Main(string[] args)
{
try
{
var ptr = FindWindow("Shell_TrayWnd", null);
Console.WriteLine("INIT PTR: {0}", ptr.ToInt32());
PostMessage(ptr, WM_USER + 436, (IntPtr)0, (IntPtr)0);
do
{
ptr = FindWindow("Shell_TrayWnd", null);
Console.WriteLine("PTR: {0}", ptr.ToInt32());
if (ptr.ToInt32() == 0)
{
Console.WriteLine("Success. Breaking out of loop.");
break;
}
Thread.Sleep(1000);
} while (true);
}
catch (Exception ex)
{
Console.WriteLine("{0} {1}", ex.Message, ex.StackTrace);
}
Console.WriteLine("Restarting the shell.");
string explorer = string.Format("{0}\\{1}", Environment.GetEnvironmentVariable("WINDIR"), "explorer.exe");
Process process = new Process();
process.StartInfo.FileName = explorer;
process.StartInfo.UseShellExecute = true;
process.Start();
Console.ReadLine();
}
}
}
回答3:
I noticed no one addressed the issue of starting explorer.exe as the shell, rather than it just opening an explorer window. Took me a while to figure this out, turns out it was something simple:
string explorer = string.Format("{0}\\{1}", Environment.GetEnvironmentVariable("WINDIR"), "explorer.exe");
Process process = new Process();
process.StartInfo.FileName = explorer;
process.StartInfo.UseShellExecute = true;
process.Start();
You have to set the StartInfo.UseshellExecute as true to get it to restart as the shell.
回答4:
After FindWindow use GetWindowThreadProcessId, then OpenProcess, then TerminateProcess.
回答5:
After some more googling, I came up with the following C# solution:
using System.Diagnostics;
...
static public void RestartExplorer()
{
foreach(Process p in Process.GetProcesses()) {
if(p.MainModule.ModuleName.contains("explorer") == true)
p.Kill();
}
Process.Start("explorer.exe");
}
回答6:
This works for me on Vista:
DWORD dwPID;
HANDLE hExp;
HWND hSysTray = ::FindWindow (TEXT("Shell_TrayWnd"), NULL) ;
GetWindowThreadProcessId (hSysTray, &dwPID);
hExp = OpenProcess (PROCESS_TERMINATE, FALSE, dwPID);
if (hExp)
{
TerminateProcess (hExp, 0);
}
Sleep (2000);
ShellExecute (NULL, NULL, TEXT("explorer.exe"), NULL, NULL, SW_HIDE);
But I can't find any way to suppress the explore window that opens (I tried, hence the SW_HIDE). On Vista, running explorer.exe without parameters seems to be the same as running "explorer.exe /e" on earlier systems. You'll have to try it for yourself on XP, I don't have it here.
Note: Using TerminateProcess does seem extreme, but posting a WM_CLOSE to explorer provokes a windows shutdown dialog.
回答7:
This is for Windows 7/8 (and need testing, maybe even works on Vista).
Since there is a proper way to close Explorer (progman) included in Windows 7 & 8 - by right clicking the taskbar (Shell_TrayWnd in Win8 or StartMenu on Win7) while pressing Ctrl-Shift, it shows in the popup menu a hidden option to close Explorer, and digging it using Spy++ it is triggered by message WM_USER+436.
So I tested and doing the following it works great.
PostMessage(FindWindow('Shell_TrayWnd'),nil),WM_USER+436,0,0);
It closes Explorer, with all the opened instances. And to relaunch explorer, use the methods provided above.
So, please confirm in comments if this works on 32bit/64bit editions of your windows vista/7/8 or any other.
回答8:
A C# solution that provides more certainty that the "right" explorer processes get killed.
using System;
using System.Diagnostics;
...............
public static void RestartExplorer()
{
const string explorer = "explorer.exe";
string explorerPath = string.Format("{0}\\{1}", Environment.GetEnvironmentVariable("WINDIR"), explorer);
foreach (Process process in Process.GetProcesses())
{
// In case we get Access Denied
try
{
if (string.Compare(process.MainModule.FileName, explorerPath, StringComparison.OrdinalIgnoreCase) == 0)
{
process.Kill();
}
}
catch
{
}
}
Process.Start(explorer);
}
来源：https://stackoverflow.com/questions/565405/how-to-programmatically-restart-windows-explorer-process