private static void SetVariable(string fullpath, string value, bool isRegExpandSz)
{
object objValue = value;
object objType = (isRegExpandSz) ? "REG_EXPAND_SZ" : "REG_SZ";
WshShell shell = new WshShell();
shell.RegWrite(fullpath, ref objValue, ref objType);
// need to call BroadcastChange() to modify registry
}
//
// Thank you Greg Houston for a good solution
// http://ghouston.blogspot.com/2005/08/how-to-create-and-change-environment.html
/// <summary>
/// Sets the variable.
/// </summary>
/// <param name="fullpath">The fullpath.</param>
/// <param name="value">The value.</param>
/// <param name="isRegExpandSz">if set to <c>true</c> [is reg expand sz].</param>
private void SetVariable(string fullpath, string value, bool isRegExpandSz)
{
object objValue = value;
object objType = (isRegExpandSz) ? "REG_EXPAND_SZ" : "REG_SZ";
shell.RegWrite(fullpath, ref objValue, ref objType);
int result;
SendMessageTimeout((System.IntPtr)HWND_BROADCAST, WM_SETTINGCHANGE,
0, "Environment", SMTO_BLOCK | SMTO_ABORTIFHUNG | SMTO_NOTIMEOUTIFNOTHUNG, 5000, out result);
}