C# Signature:

[DllImport("advapi32.dll", EntryPoint="EnumDependentServicesW", ExactSpelling=true, SetLastError=true)]
static extern bool EnumDependentServices( IntPtr hService,
                       SERVICE_STATES dwServiceState,
                       ref ENUM_SERVICE_STATUS lpServices,
                       int cbBufSize,
                       ref int pcbBytesNeeded,
                       ref int lpServicesReturned );

VB Signature:

Declare Function EnumDependentServices Lib "advapi32.dll" (TODO) As TODO

User-Defined Types:

None.

Notes:

None.

See:

SERVICE_STATES, SERVICE_TYPES, ENUM_SERVICE_STATUS, OpenSCManager, EnumServicesStatus, and OpenService

Tips & Tricks:

Please add some!

Sample Code:

IntPtr handle = OpenSCManager( null, null, SCM_ACCESS.SC_MANAGER_ALL_ACCESS );
if ( handle != IntPtr.Zero )
{
     int iBytesNeeded = 0;
     int iServicesReturned = 0;
     int iResumeHandle = 0;

     if ( !EnumServicesStatus( handle,
                 SERVICE_TYPES.SERVICE_WIN32,
                 SERVICE_STATES.SERVICE_STATE_ALL,
                 IntPtr.Zero,
                 0,
                 ref iBytesNeeded,
                 ref iServicesReturned,
                 ref iResumeHandle ) )
     {
     // Don't forget to test for ERROR_MORE_DATA before proceeding (removed for brevity)
     IntPtr buf = Marshal.AllocHGlobal( (int) iBytesNeeded );
     if ( !EnumServicesStatus( handle,
                     SERVICE_TYPES.SERVICE_WIN32,
                     SERVICE_STATES.SERVICE_STATE_ALL,
                     buf,
                     iBytesNeeded,
                     ref iBytesNeeded,
                     ref iServicesReturned,
                     ref iResumeHandle ) )
     {
         Debug.WriteLine("EnumServicesStatus Failed " + Marshal.GetLastWin32Error() );
     }
     else
     {
         ENUM_SERVICE_STATUS serviceStatus;
         int iPtr = buf.ToInt32();
         for ( int i = 0 ; i < (int) iServicesReturned; i++ )
         {
         serviceStatus = (ENUM_SERVICE_STATUS) Marshal.PtrToStructure( new IntPtr(iPtr), typeof(ENUM_SERVICE_STATUS) );
         Debug.WriteLine("Service " + serviceStatus.pServiceName );
         Debug.Indent();
         IntPtr hService = OpenService( handle, serviceStatus.pServiceName, SERVICE_ACCESS.SERVICE_ALL_ACCESS );
         if ( hService != IntPtr.Zero )
         {
             int iDepBytesNeeded = 0;
             int iDepServicesReturned = 0;

             if ( !EnumDependentServices( hService,
                             SERVICE_STATES.SERVICE_STATE_ALL,
                             IntPtr.Zero,
                             0,
                             ref iDepBytesNeeded,
                             ref iDepServicesReturned ) )
             {
             // Don't forget to test for ERROR_MORE_DATA before proceeding (removed for brevity)
                 IntPtr depBuf = Marshal.AllocHGlobal( (int) iDepBytesNeeded );
             IntPtr depBuf = Marshal.AllocHGlobal( (int) iDepBytesNeeded );
             if ( !EnumDependentServices( hService,
                             SERVICE_STATES.SERVICE_STATE_ALL,
                             depBuf,
                             iDepBytesNeeded,
                             ref iDepBytesNeeded,
                             ref iDepServicesReturned ) )
             {
                 Debug.WriteLine("EnumDependentServices Failed " + Marshal.GetLastWin32Error() );
             }
             else
             {
                 ENUM_SERVICE_STATUS depService;
                 int iDepPtr = depBuf.ToInt32();
                 for ( int j = 0 ; j < (int) iDepServicesReturned; j++ )
                 {
                 depService = (ENUM_SERVICE_STATUS) Marshal.PtrToStructure( new IntPtr(iDepPtr), typeof(ENUM_SERVICE_STATUS) );
                 Debug.WriteLine("Dep on " + depService.pServiceName );
                 iDepPtr += ENUM_SERVICE_STATUS.SizeOf;
                 }
             }
             }
             CloseServiceHandle( hService );
         }
         else
         {
             Debug.WriteLine("OpenService Failed " + Marshal.GetLastWin32Error() );
         }
         Debug.Unindent();
         iPtr += ENUM_SERVICE_STATUS.SizeOf;
         }
     }
     }
     CloseServiceHandle( handle );
}

Alternative Managed API:

Do you know one? Please contribute it!

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).