asked on Publish that Environment Variables have been updated
Hi,
I am using SETX from Microsoft's Support Tools to set Environment Variables during logon. Another process I have needs the information from those Environment Variables I have set.
AFAIK SETX does not do the SendMessage function to notify applications that there is an update to Environment Variables, and I've been looking for ways to do this since browsing the internet does not yield simple applications that just invoke this function and then end.
I've found a C# sample on how to import the user32.dll which has this function, but not what code I need to use to invoke the SendMessage function.
Hints or samples of what I need to enclose this to a working program would be awsome ;)
I am using SETX from Microsoft's Support Tools to set Environment Variables during logon. Another process I have needs the information from those Environment Variables I have set.
AFAIK SETX does not do the SendMessage function to notify applications that there is an update to Environment Variables, and I've been looking for ways to do this since browsing the internet does not yield simple applications that just invoke this function and then end.
I've found a C# sample on how to import the user32.dll which has this function, but not what code I need to use to invoke the SendMessage function.
Hints or samples of what I need to enclose this to a working program would be awsome ;)
[DllImport("user32.dll", CharSet = CharSet.Auto)]
static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, IntPtr wParam, IntPtr lParam);
.NET ProgrammingC#Windows XP
Last Comment
TheFlyingCorpse
ASKER
yes, it helped me a great deal =)
Sadly, I dont know if my code works, it works only if run by administrators.
On a sidenote, I dont know if the program I wrote it to work against will actually accept this, Novell Application Explorer. If the program "I" wrote works(unable to verify), then its probable that NAL itself is not listening for these broadcasts and able to update.
Any ideas?
Sadly, I dont know if my code works, it works only if run by administrators.
On a sidenote, I dont know if the program I wrote it to work against will actually accept this, Novell Application Explorer. If the program "I" wrote works(unable to verify), then its probable that NAL itself is not listening for these broadcasts and able to update.
Any ideas?
using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Text;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
SetVariable();
}
private static void SetVariable()
{
int result;
SendMessageTimeout((System.IntPtr)HWND_BROADCAST,
WM_SETTINGCHANGE, 0, "Environment", SMTO_BLOCK | SMTO_ABORTIFHUNG |
SMTO_NOTIMEOUTIFNOTHUNG, 5000, out result);
if (result == 0)
Console.WriteLine("It works");
else
Console.WriteLine("Errorcode " + result.ToString());
}
[DllImport("user32.dll",
CharSet = CharSet.Auto, SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool
SendMessageTimeout(
IntPtr hWnd,
int Msg,
int wParam,
string lParam,
int fuFlags,
int uTimeout,
out int lpdwResult
);
public const int HWND_BROADCAST = 0xffff;
public const int WM_SETTINGCHANGE = 0x001A;
public const int SMTO_NORMAL = 0x0000;
public const int SMTO_BLOCK = 0x0001;
public const int SMTO_ABORTIFHUNG = 0x0002;
public const int SMTO_NOTIMEOUTIFNOTHUNG = 0x0008;
}
}
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ASKER
Very good help and also helpful in verifying the application that was written works, but the inded destination program does not use this feature anyway.
Excellent help!
Excellent help!
http://ghouston.blogspot.c