Calling OCCI from a windows service

Hello, I am trying to call OCCI from a windows service. And as soon as I put in the createEnvironment call the service will not load. I get an Error 1053: The service did not respond to the start or control request in a timely fashion. Anyone else seen this problem? Any ideas?

I'm using 10.2.0.1.0 downloaded a couple of weeks ago.
My english is not so good to completelly understand your last sentence.
Nobody directed me in using OCCI in a service. I had to face the proble to let my I.R. engine write XML data into an XMLTYPE object in Oracle, I downloaded the OCCI library and samples and build some code for my test.
Everityhing seems to work properly using Clob containers, while XMLType columns can be created but I can't read the value as the result of a select.
Anyway, OCCI 10.2.0.1.0 compiled with Visual C++ 2008 (VC9) with a couple of tricks with manifest to use oraocci10.lib (built for VC8) works for me even as a service.
I have to say that this code is in a DLL that I dynamically load and use.
Does it make sense for you?

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Hi Hassan,
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using System;
using System.Runtime.InteropServices;
using System.Diagnostics;
namespace WindowsServiceLaunchingExe
class NativeMethods
[StructLayout(LayoutKind.Sequential)]
public struct PROCESS_INFORMATION {
public IntPtr hProcess;
public IntPtr hThread;
public System.UInt32 dwProcessId;
public System.UInt32 dwThreadId;
[StructLayout(LayoutKind.Sequential)]
public struct SECURITY_ATTRIBUTES {
public System.UInt32 nLength;
public IntPtr lpSecurityDescriptor;
public bool bInheritHandle;
[StructLayout(LayoutKind.Sequential)]
public struct STARTUPINFO {
public System.UInt32 cb;
public string lpReserved;
public string lpDesktop;
public string lpTitle;
public System.UInt32 dwX;
public System.UInt32 dwY;
public System.UInt32 dwXSize;
public System.UInt32 dwYSize;
public System.UInt32 dwXCountChars;
public System.UInt32 dwYCountChars;
public System.UInt32 dwFillAttribute;
public System.UInt32 dwFlags;
public short wShowWindow;
public short cbReserved2;
public IntPtr lpReserved2;
public IntPtr hStdInput;
public IntPtr hStdOutput;
public IntPtr hStdError;
[StructLayout(LayoutKind.Sequential)]
public struct PROFILEINFO {
public int dwSize;
public int dwFlags;
[MarshalAs(UnmanagedType.LPTStr)]
public string lpUserName;
[MarshalAs(UnmanagedType.LPTStr)]
public string lpProfilePath;
[MarshalAs(UnmanagedType.LPTStr)]
public string lpDefaultPath;
[MarshalAs(UnmanagedType.LPTStr)]
public string lpServerName;
[MarshalAs(UnmanagedType.LPTStr)]
public string lpPolicyPath;
public IntPtr hProfile;
internal enum SECURITY_IMPERSONATION_LEVEL {
SecurityAnonymous = 0,
SecurityIdentification = 1,
SecurityImpersonation = 2,
SecurityDelegation = 3
internal enum TOKEN_TYPE {
TokenPrimary = 1,
TokenImpersonation = 2
[DllImport("advapi32.dll", SetLastError = true, CharSet = CharSet.Auto)]
private static extern bool CreateProcessAsUser(IntPtr hToken, string lpApplicationName, string lpCommandLine, ref SECURITY_ATTRIBUTES lpProcessAttributes, ref SECURITY_ATTRIBUTES lpThreadAttributes, bool bInheritHandles, uint dwCreationFlags, IntPtr lpEnvironment, string lpCurrentDirectory, ref STARTUPINFO lpStartupInfo, ref PROCESS_INFORMATION lpProcessInformation);
[DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
public static extern bool DuplicateTokenEx(IntPtr hExistingToken, uint dwDesiredAccess, ref SECURITY_ATTRIBUTES lpTokenAttributes, SECURITY_IMPERSONATION_LEVEL ImpersonationLevel, TOKEN_TYPE TokenType, ref IntPtr phNewToken);
[DllImport("advapi32.dll", SetLastError = true)]
private static extern bool OpenProcessToken(IntPtr ProcessHandle, int DesiredAccess, ref IntPtr TokenHandle);
[DllImport("userenv.dll", SetLastError = true)]
private static extern bool CreateEnvironmentBlock(ref IntPtr lpEnvironment, IntPtr hToken, bool bInherit);
[DllImport("userenv.dll", SetLastError = true)]
private static extern bool DestroyEnvironmentBlock(IntPtr lpEnvironment);
private const short SW_SHOW = 1;
private const short SW_SHOWMAXIMIZED = 7;
private const int TOKEN_QUERY = 8;
private const int TOKEN_DUPLICATE = 2;
private const int TOKEN_ASSIGN_PRIMARY = 1;
private const int GENERIC_ALL_ACCESS = 268435456;
private const int STARTF_USESHOWWINDOW = 1;
private const int STARTF_FORCEONFEEDBACK = 64;
private const int CREATE_UNICODE_ENVIRONMENT = 0x00000400;
private const string gs_EXPLORER = "explorer";
public static void LaunchProcess(string Ps_CmdLine)
IntPtr li_Token = default(IntPtr);
IntPtr li_EnvBlock = default(IntPtr);
Process[] lObj_Processes = Process.GetProcessesByName(gs_EXPLORER);
// Get explorer.exe id
// If process not found
if (lObj_Processes.Length == 0)
// Exit routine
return;
// Get primary token for the user currently logged in
li_Token = GetPrimaryToken(lObj_Processes[0].Id);
// If token is nothing
if (li_Token.Equals(IntPtr.Zero))
// Exit routine
return;
// Get environment block
li_EnvBlock = GetEnvironmentBlock(li_Token);
// Launch the process using the environment block and primary token
LaunchProcessAsUser(Ps_CmdLine, li_Token, li_EnvBlock);
// If no valid enviroment block found
if (li_EnvBlock.Equals(IntPtr.Zero))
// Exit routine
return;
// Destroy environment block. Free environment variables created by the
// CreateEnvironmentBlock function.
DestroyEnvironmentBlock(li_EnvBlock);
private static IntPtr GetPrimaryToken(int Pi_ProcessId) {
IntPtr li_Token = IntPtr.Zero;
IntPtr li_PrimaryToken = IntPtr.Zero;
bool lb_ReturnValue = false;
Process lObj_Process = Process.GetProcessById(Pi_ProcessId);
SECURITY_ATTRIBUTES lObj_SecurityAttributes = default(SECURITY_ATTRIBUTES);
// Get process by id
// Open a handle to the access token associated with a process. The access token
// is a runtime object that represents a user account.
lb_ReturnValue = OpenProcessToken(lObj_Process.Handle, TOKEN_DUPLICATE, ref li_Token);
// If successfull in opening handle to token associated with process
if (lb_ReturnValue) {
// Create security attributes to pass to the DuplicateTokenEx function
lObj_SecurityAttributes = new SECURITY_ATTRIBUTES();
lObj_SecurityAttributes.nLength = Convert.ToUInt32(Marshal.SizeOf(lObj_SecurityAttributes));
// Create a new access token that duplicates an existing token. This function
// can create either a primary token or an impersonation token.
lb_ReturnValue = DuplicateTokenEx(li_Token, Convert.ToUInt32(TOKEN_ASSIGN_PRIMARY | TOKEN_DUPLICATE | TOKEN_QUERY), ref lObj_SecurityAttributes, SECURITY_IMPERSONATION_LEVEL.SecurityIdentification, TOKEN_TYPE.TokenPrimary, ref li_PrimaryToken);
// If un-successful in duplication of the token
if (!lb_ReturnValue) {
// Throw exception
throw new Exception(string.Format("DuplicateTokenEx Error: {0}", Marshal.GetLastWin32Error()));
else {
// If un-successful in opening handle for token then throw exception
throw new Exception(string.Format("OpenProcessToken Error: {0}", Marshal.GetLastWin32Error()));
// Return primary token
return li_PrimaryToken;
private static IntPtr GetEnvironmentBlock(IntPtr Pi_Token) {
IntPtr li_EnvBlock = IntPtr.Zero;
bool lb_ReturnValue = CreateEnvironmentBlock(ref li_EnvBlock, Pi_Token, false);
// Retrieve the environment variables for the specified user.
// This block can then be passed to the CreateProcessAsUser function.
// If not successful in creation of environment block then
if (!lb_ReturnValue) {
// Throw exception
throw new Exception(string.Format("CreateEnvironmentBlock Error: {0}", Marshal.GetLastWin32Error()));
// Return the retrieved environment block
return li_EnvBlock;
private static void LaunchProcessAsUser(string Ps_CmdLine, IntPtr Pi_Token, IntPtr Pi_EnvBlock) {
bool lb_Result = false;
PROCESS_INFORMATION lObj_ProcessInformation = default(PROCESS_INFORMATION);
SECURITY_ATTRIBUTES lObj_ProcessAttributes = default(SECURITY_ATTRIBUTES);
SECURITY_ATTRIBUTES lObj_ThreadAttributes = default(SECURITY_ATTRIBUTES);
STARTUPINFO lObj_StartupInfo = default(STARTUPINFO);
// Information about the newly created process and its primary thread.
lObj_ProcessInformation = new PROCESS_INFORMATION();
// Create security attributes to pass to the CreateProcessAsUser function
lObj_ProcessAttributes = new SECURITY_ATTRIBUTES();
lObj_ProcessAttributes.nLength = Convert.ToUInt32(Marshal.SizeOf(lObj_ProcessAttributes));
lObj_ThreadAttributes = new SECURITY_ATTRIBUTES();
lObj_ThreadAttributes.nLength = Convert.ToUInt32(Marshal.SizeOf(lObj_ThreadAttributes));
// To specify the window station, desktop, standard handles, and appearance of the
// main window for the new process.
lObj_StartupInfo = new STARTUPINFO();
lObj_StartupInfo.cb = Convert.ToUInt32(Marshal.SizeOf(lObj_StartupInfo));
lObj_StartupInfo.lpDesktop = null;
lObj_StartupInfo.dwFlags = Convert.ToUInt32(STARTF_USESHOWWINDOW | STARTF_FORCEONFEEDBACK);
lObj_StartupInfo.wShowWindow = SW_SHOW;
// Creates a new process and its primary thread. The new process runs in the
// security context of the user represented by the specified token.
lb_Result = CreateProcessAsUser(Pi_Token, null, Ps_CmdLine, ref lObj_ProcessAttributes, ref lObj_ThreadAttributes, true, CREATE_UNICODE_ENVIRONMENT, Pi_EnvBlock, null, ref lObj_StartupInfo, ref lObj_ProcessInformation);
// If create process return false then
if (!lb_Result) {
// Throw exception
throw new Exception(string.Format("CreateProcessAsUser Error: {0}", Marshal.GetLastWin32Error()));
To use the code, create a new windows service project, and add code like the following one:
using System;
using System.Diagnostics;
using System.ServiceProcess;
using System.Timers;
namespace WindowsServiceLaunchingExe
public partial class ExeLauncherSvc : ServiceBase
public ExeLauncherSvc() {
InitializeComponent();
Timer timer;
protected override void OnStart(string[] args) {
timer = new Timer(5000);
timer.Elapsed += (sender, e) => {
try {
timer.Stop();
EventLog.WriteEntry("WindowsServiceLaunchingExe", "Launching process...");
NativeMethods.LaunchProcess(@"C:\Windows\notepad.exe");
} catch (Exception ex) {
EventLog.WriteEntry("WindowsServiceLaunchingExe", ex.Message);
timer.Start();
protected override void OnStop() {
Because NativeMethods.LaunchProcess() throws exceptions on errors, be sure to enclose calling code in a try/catch-block.
I also would recommend reading this:
Stephen Martin - The Perils and Pitfalls of Launching a Process Under New Credentials
http://asprosys.blogspot.com/2009/03/perils-and-pitfalls-of-launching.html
Stephen Martin - Launch Process From Service (code download)
http://www.asprosys.com/Downloads/LaunchProcessFromService.zip
Marcel

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Because I am not certain I an interpreting what you mean - although it looks quite literal - I am going to provide three separate pieces of information:
- To remove a contact's name from your Skype sign-in window, please refer to the instruction in this FAQ article - using their account name, not yours: https://support.skype.com/en/faq/FA11070/how-can-i-remove-my-skype-name-from-the-sign-in-screen-in-s...
- In case you mean removing a contact from the Skype Home Screen when you say, "sign in window," unfortunately, we cannot do this. Skype has some arbitrary algorithm which places recently contacted people on the Home Screen.
- In case you mean removing a contact from your contact list, here is an FAQ with the details how to do this: https://support.skype.com/en/faq/FA421/how-do-i-organize-my-contacts In Windows, it's as easy as highlighting by single-clicking a contact's name, right-click, and choose Remove from Contacts or Block.
Hope this helps!
Elaine
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Excel Automation with Interop - Windows Service - Microsoft Excel cannot access the file

I have a windows console application, which automates Excel. In our scenario the application gets called from a Windows Service. If the console app is executed directly everything works fine. If the console app is executed through the Win Service, we get
the following error when trying to open the excel file:
Unhandled exception Occured : 'Microsoft Excel cannot access the file 'bla.xls'. There are several possible reasons:
The file name or path does not exist.
The file is being used by another program.
The workbook you are trying to save has the same name as a currently open workbook.'.'
The code snippet used to open the file:
xlApp = new Application();xlApp.Visible = false;xlApp.UserControl = false;xlApp.Application.ScreenUpdating = false;xlApp.DisplayAlerts = false;xlWorkbook = xlApp.Workbooks.Open( Filename: filePath, UpdateLinks: 2, IgnoreReadOnlyRecommended: true, Editable: false);
The console app and windows service are running on a Win Server 2008 64-bit OS with Excel 2013 32-bit installed. The service is running with a special user account, which has all the right permissions on accessed files and folders. The excel process is also
started with the same account (I cheched that one).
I already tried to do the following, but to no avail:
Run excel.exe /automation -> worked fine
Created the folders and also gave full control to the account under which the service is run (even gave full control to Everyone)
C:\Windows\SysWOW64\config\systemprofile\Desktop
C:\Windows\System32\config\systemprofile\Desktop
Configured DCOM
Excel Application -> Identity -> Specific user account
Excel Application -> Identity -> Interactive User
Excel Application -> Security -> Launch permissions -> Everyone full control
Several combinations of the above
So I really am stuck with this problem right now. Any input on this is appreciated.

I have a windows console application, which automates Excel. In our scenario the application gets called from a Windows Service. If the console app is executed directly everything works fine. If the console app is executed through the Win Service, we get
the following error when trying to open the excel file
Microsoft does not currently recommend, and does not support, Automation of Microsoft Office applications from any unattended, non-interactive client application or component (including ASP, ASP.NET, DCOM, and NT Services), because Office
may exhibit unstable behavior and/or deadlock when Office is run in this environment.
If you are building a solution that runs in a server-side context, you should try to use components that have been made safe for unattended execution. Or, you should try to find alternatives that allow at least part of the code to run client-side.
If you use an Office application from a server-side solution, the application will lack many of the necessary capabilities to run successfully. Additionally, you will be taking risks with the stability of your overall solution.
You can read more about that in the
Considerations for server-side Automation of Office article.

Calling OCCI from a windows service

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