ResumeService method of the Win32_Service class (CIMWin32 WMI Providers)

Artikel
11/09/2023

The ResumeService WMI class method attempts to place the referenced service in the resumed state.

This topic uses Managed Object Format (MOF) syntax. For more information about using this method, see Calling a Method.

Syntax

uint32 ResumeService();

Parameters

This method has no parameters.

Return value

Returns one of the values listed in the following list, or any other value to indicate an error. For additional error codes, see WMI Error Constants or WbemErrorEnum. For general HRESULT values, see System Error Codes.

0: The request was accepted.
1: The request is not supported.
2: The user did not have the necessary access.
3: The service cannot be stopped because other services that are running are dependent on it.
4: The requested control code is not valid, or it is unacceptable to the service.
5: The requested control code cannot be sent to the service because the state of the service (Win32_BaseService.State property) is equal to 0, 1, or 2.
6: The service has not been started.
7: The service did not respond to the start request in a timely fashion.
8: Unknown failure when starting the service.
9: The directory path to the service executable file was not found.
10: The service is already running.
11: The database to add a new service is locked.
12: A dependency this service relies on has been removed from the system.
13: The service failed to find the service needed from a dependent service.
14: The service has been disabled from the system.
15: The service does not have the correct authentication to run on the system.
16: This service is being removed from the system.
17: The service has no execution thread.
18: The service has circular dependencies when it starts.
19: A service is running under the same name.
20: The service name has invalid characters.
21: Invalid parameters have been passed to the service.
22: The account under which this service runs is either invalid or lacks the permissions to run the service.
23: The service exists in the database of services available from the system.
24: The service is currently paused in the system.

Remarks

Although there might appear to be no practical difference between a service that is stopped and a service that is paused, the two states appear differently to the SCM. A stopped service is a service that is not running and must go through the entire service start procedure. A paused service, however, is still running but has had its functioning is suspended. Because of this, a paused service does not need to go through the entire service start procedure but needs a different procedure to resume functioning.

You must use the proper method to start a service that has been stopped or to resume a service that has been paused. The Win32_Service methods StartService and ResumeService should be used in the following situations:

If a service is currently stopped, you must use the StartService method to restart it; ResumeService cannot start a service that is currently stopped.
If a service is paused, you must use ResumeService. If you use the StartService method on a paused service, you receive the message, "The service is already running." However, the service remains paused until the resume service control code is sent to it.

Examples

The following VBScript code sample describes how to resume a paused service from instances of Win32_Service.

Note

The service must support pausing and be running already.

Set ServiceSet = GetObject("winmgmts:").ExecQuery("select * from Win32_Service where Name='Schedule'")

for each Service in ServiceSet
 SupportsPause = Service.AcceptPause
 if SupportsPause = true then
  RetVal = Service.ResumeService()
  if RetVal = 0 then 
   WScript.Echo "Service resumed"   
  else
   if RetVal = 1 then 
    WScript.Echo "Pause not supported" 
   else WScript.Echo "An error occurred:" & RetVal
   End If
  End If
 else
  WScript.Echo "Service does not support pause"
 end if
next

The following Perl code sample describes how to resume a paused service from instances of Win32_Service.

Note

The service must support pausing and be running already.

use strict;
use Win32::OLE;

my $ServiceSet;

eval { $ServiceSet = Win32::OLE->GetObject("winmgmts:{impersonationLevel=impersonate}!\\\\.\\Root\\CIMv2")->
 ExecQuery("SELECT * FROM Win32_Service WHERE Name='Schedule'"); };

if (!$@ && defined $ServiceSet)
{
 foreach my $Service (in $ServiceSet)
 {
  my $SupportsPause = $Service->{AcceptPause};
  if ($SupportsPause)
  {
   my $RetVal = $Service->ResumeService();
   if ($RetVal == 0)
   {
    print "\nService resumed\n";
   }
   else
   {
    if ($RetVal == 1)
    {
     print STDERR "\nPause not supported\n";
    }
    else
    {
     print STDERR "\nAn error occurred: ", $RetVal, "\n";
    }
   }
  }
  else
  {
   print "\nService does not support pause\n";
  }
 }
}
else
{
 print STDERR Win32::OLE->LastError, "\n";
}

Requirements

Requirement	Value
Minimum supported client	Windows Vista
Minimum supported server	Windows Server 2008
Namespace	Root\CIMv2
MOF	CIMWin32.mof
DLL	CIMWin32.dll

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