ASP.net webservice security preventing WndProc & run with parameters

[Hidendra]

I have a webservice with a couple of methods that attempt to run or message another .EXE on the system to do a specific task.Either we can start the .EXE process with certain parameters or send it a WndProc message to make it do the desired operation. This works fine locally on my system calling the exe with parameters in cmd or sending a WndProc message from the webservice when debugging it in Visual Studio.None of this works over a real environment however. I had the run .Exe with parameters method (DoSomething) write the exception to a file:\[code\]System.ComponentModel.Win32Exception (0x80004005): No Accessat System.Diagnostics.Process.StartWithShellExecuteEx(ProcessStartInfo startInfo)at System.Diagnostics.Process.Start()at Someprogram.ProgramService.DoSomething(String text)\[/code\]The other method for wndproc sendmessage I wrapped in a try/catch as well but no exception thrown. It actually locates the process though as I had it print a file:\[code\]public static void SendMessageToSomeProgram(string message) { Process[] processes = Process.GetProcessesByName("SomeProgram"); if (processes.Length >= 1) { //iterate through all running target applications foreach (Process p in processes) { //test write if process found TextWriter tw = new StreamWriter(@"c:\wndprocfile.txt"); //this file is printed tw.WriteLine(DateTime.Now.ToString()); tw.Close(); //do stuff try { byte[] sarr = System.Text.Encoding.Default.GetBytes(message); int len = sarr.Length; COPYDATASTRUCT cds; cds.dwData = http://stackoverflow.com/questions/12774914/(IntPtr)100; cds.lpData = message; cds.cbData = len + 1; SendMessage(p.MainWindowHandle, WM_COPYDATA, 0, ref cds); } catch (Exception ex) { TextWriter tw2 = new StreamWriter(@"c:\wndProc_errorfile.txt"); //not printed tw2.WriteLine(DateTime.Now.ToString() + "Exception: " + ex.ToString()); tw2.Close(); } }}\[/code\]Now I see why it's nice to have security like this in place but is there an easy way around this? Maybe just some settings in IIS?