设置注册表项，如何不重启立即生效

某些windows设置的时候，我们如果通过代码设置的时候，通常是修改一些注册表项，可是每次都不是立即生效，查了半天发现原来还需要调一个api通知所有窗体，经测试好使，代码如下：

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

using Microsoft.Win32;

using System.Runtime.InteropServices;

namespace restrict

{

public partial class Form1 : Form

{

int delflag = 1;

IntPtr result1;

// SendMessageTimeout tools

[Flags]

public enum SendMessageTimeoutFlags : uint

{

SMTO_NORMAL = 0x0000,

SMTO_BLOCK = 0x0001,

SMTO_ABORTIFHUNG = 0x0002,

SMTO_NOTIMEOUTIFNOTHUNG = 0x0008

}

const int WM_SETTINGCHANGE = 0x001A;

const int HWND_BROADCAST = 0xffff;

[DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]

public static extern IntPtr SendMessageTimeout(

IntPtr windowHandle,

uint Msg,

IntPtr wParam,

IntPtr lParam,

SendMessageTimeoutFlags flags,

uint timeout,

out IntPtr result

);

public Form1()

{

InitializeComponent();





RegistryKey hkcu = Registry.CurrentUser;

RegistryKey cu = hkcu.CreateSubKey(@"Software/Microsoft/Windows/CurrentVersion/Policies/Explorer/RestrictRun");

RegistryKey cu1 = hkcu.CreateSubKey(@"SOFTWARE/MICROSOFT/WINDOWS/CURRENTVERSION/Policies/Explorer");

RegistryKey cu2 = hkcu.OpenSubKey(@"SOFTWARE/MICROSOFT/WINDOWS/CURRENTVERSION/RUN", true);

string aa = Application.ExecutablePath;

cu2.SetValue("RestrictFun", aa);



cu1.SetValue("RestrictRun", 1);

cu.SetValue("1", "notepad.exe");

cu.SetValue("2", "gpedit.msc");

cu.SetValue("3", "regedit.exe");

cu.SetValue("4", "tmshell.exe");

cu.SetValue("5", "kav.exe");

cu.SetValue("6", "TTraveler.exe");

cu.SetValue("7", "iexplore.exe");

cu.SetValue("8", "mmc.exe");

cu.SetValue("9", "restrict.exe");

hkcu.Close();

SendMessageTimeout(

new IntPtr(HWND_BROADCAST), 

WM_SETTINGCHANGE, 

IntPtr.Zero, 

IntPtr.Zero,

SendMessageTimeoutFlags.SMTO_NORMAL,

1000,

out result1);



}





public void delres()

{

RegistryKey hkcu = Registry.CurrentUser;

RegistryKey cu = hkcu.OpenSubKey(@"SOFTWARE/MICROSOFT/WINDOWS/CURRENTVERSION/Policies/Explorer", true);

cu.DeleteValue("RestrictRun");

cu.DeleteSubKey("RestrictRun");

hkcu.Close();



SendMessageTimeout(

new IntPtr(HWND_BROADCAST),

WM_SETTINGCHANGE,

IntPtr.Zero,

IntPtr.Zero,

SendMessageTimeoutFlags.SMTO_NORMAL,

1000,

out result1);

delflag = 0;

}



private void timer1_Tick(object sender, EventArgs e)

{



if ((DateTime.Now.Hour >= 12)&&(DateTime.Now.Hour <= 14)&&(delflag==1)) 

{



delres();



}

}

}

}