Hi I need to use QueryServiceConfig WinAPI Method, using C# Interop,
VS2003.NET.
The .NET ServiceController class can not do what I need.

I am unable to correctly call the QueryServiceConfig() method, can you help?

Here is my code:

// Begin Source Code
using System;
using System.Runtime.InteropServices;

class ServiceTest
{
[DllImport("advapi32.dll", CharSet=CharSet.Unicode, SetLastError=true)]
public static extern IntPtr OpenSCManager(String lpMachineName, String
lpDatabaseName, UInt32 dwDesiredAccess);
[DllImport("advapi32.dll", CharSet=CharSet.Unicode, SetLastError=true)]
public static extern IntPtr OpenService(IntPtr hSCManager, String
lpServiceName, UInt32 dwDesiredAccess);
[DllImport("advapi32.dll", CharSet=CharSet.Unicode, SetLastError=true)]
public static extern Boolean QueryServiceConfig(IntPtr hService, IntPtr
intPtrQueryConfig, UInt32 cbBufSize, out UInt32 pcbBytesNeeded);

[StructLayout(LayoutKind.Sequential)]
public class QUERY_SERVICE_CONFIG
{
 [MarshalAs(System.Runtime.InteropServices.UnmanagedType.U4)]
 public UInt32 dwServiceType;
 [MarshalAs(System.Runtime.InteropServices.UnmanagedType.U4)]
 public UInt32 dwStartType;
 [MarshalAs(System.Runtime.InteropServices.UnmanagedType.U4)]
 public UInt32 dwErrorControl;
 [MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPWStr)]
 public String lpBinaryPathName;
 [MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPWStr)]
 public String lpLoadOrderGroup;
 [MarshalAs(System.Runtime.InteropServices.UnmanagedType.U4)]
 public UInt32 dwTagID;
 [MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPWStr)]
 public String lpDependencies;
 [MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPWStr)]
 public String lpServiceStartName;
 [MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPWStr)]
 public String lpDisplayName;
};

private const int SC_MANAGER_ALL_ACCESS = 0x000F003F;
private const int SERVICE_QUERY_CONFIG = 0x00000001;

[STAThread]
static void Main(string[] args)
{
 // This seems to be working.
 IntPtr databaseHandle = OpenSCManager(null, null, SC_MANAGER_ALL_ACCESS);
 if(databaseHandle == IntPtr.Zero)
  Console.WriteLine("Error OpenSCManager\n");

 // This seems to be working.
 IntPtr serviceHandle = OpenService(databaseHandle,  "Alerter",
SERVICE_QUERY_CONFIG);
 if(databaseHandle == IntPtr.Zero)
  Console.WriteLine("Error OpenService\n");

 UInt32 dwBytesNeeded = 0;

 QUERY_SERVICE_CONFIG qUERY_SERVICE_CONFIG = new QUERY_SERVICE_CONFIG();

 // I am unable to call QueryServiceConfig()
 // Don't know how to convert to Intptr Buffer.
 //Boolean success = QueryServiceConfig(serviceHandle, /* HELP !!!  */,
4096,  out dwBytesNeeded);
}
}
// End Source Code