Search
Module:
Directory

   Desktop Functions:

   Smart Device Functions:


Show Recent Changes
Subscribe (RSS)
Misc. Pages
Comments
FAQ
Helpful Tools
Playground
Suggested Reading
Website TODO List
Download Visual Studio Add-In

QueryServiceStatusEx (advapi32)
 
.
Summary
The QueryServiceStatusEx function retrieves the current status of the specified service based on the specified information level.

C# Signature:

[DllImport("advapi32.dll", CharSet=CharSet.Unicode, SetLastError=true)]
public static extern unsafe bool QueryServiceStatusEx(IntPtr serviceHandle, int infoLevel, IntPtr buffer, int bufferSize, out int bytesNeeded);

VB.net Signature:

<DllImport("advapi32.dll", CharSet := CharSet.Unicode, SetLastError := True)> _
Public Shared Function QueryServiceStatusEx(serviceHandle As IntPtr, infoLevel As Integer, buffer As IntPtr, bufferSize As Integer, ByRef bytesNeeded As Integer) As Boolean
End Function

User-Defined Types:

None.

Alternative Managed API:

Do you know one? Please contribute it!

Notes:

For infoLevel only SC_STATUS_PROCESS_INFO (0x0) is allowed .

See SERVICE_STATUS_PROCESS definition.

See OpenService to get the hService.

None.

Tips & Tricks:

Please add some!

Sample Code:

//This code is my first attempt at API calls, it works but has very little error handling so should only be used as a base not as final code.

//NB for this code to work you will need to change the SERVICE_STATUS_PROCESS class to a struct

//NB for this to work you will need to mark the assembly as Unsafe.

    public static SERVICE_STATUS_PROCESS QueryServiceStatusEx(SafeHandle serviceHandle)
    {
        unsafe
        {
        IntPtr pData=IntPtr.Zero;
        try
        {

            int iReqSize = 0;

             pData = Marshal.AllocHGlobal(sizeof(SERVICE_STATUS_PROCESS));
            bool bOk = QueryServiceStatusEx(serviceHandle.DangerousGetHandle(), 0, pData, sizeof(SERVICE_STATUS_PROCESS), out
                     iReqSize);
            if (!bOk)
            {
            throw new Win32Exception();
            }
            SERVICE_STATUS_PROCESS pStatus = (SERVICE_STATUS_PROCESS)Marshal.PtrToStructure(pData, typeof(SERVICE_STATUS_PROCESS));
            return pStatus;
        }
        finally
        {
            if (!pData.Equals(IntPtr.Zero))
            Marshal.FreeHGlobal(pData);
        }
        }

Documentation

Please edit this page!

Do you have...

  • helpful tips or sample code to share for using this API in managed code?
  • corrections to the existing content?
  • variations of the signature you want to share?
  • additional languages you want to include?

Select "Edit This Page" on the right hand toolbar and edit it! Or add new pages containing supporting types needed for this API (structures, delegates, and more).

 
Access PInvoke.net directly from VS:
Terms of Use
Edit This Page
Find References
Show Printable Version
Revisions