QUERY_SERVICE_CONFIGA structure (winsvc.h)
Contains configuration information for an installed service. It is used by the QueryServiceConfig function.
Syntax
typedef struct _QUERY_SERVICE_CONFIGA {
DWORD dwServiceType;
DWORD dwStartType;
DWORD dwErrorControl;
LPSTR lpBinaryPathName;
LPSTR lpLoadOrderGroup;
DWORD dwTagId;
LPSTR lpDependencies;
LPSTR lpServiceStartName;
LPSTR lpDisplayName;
} QUERY_SERVICE_CONFIGA, *LPQUERY_SERVICE_CONFIGA;
Members
dwServiceType
The type of service. This member can be one of the following values.
If the value is SERVICE_WIN32_OWN_PROCESS or SERVICE_WIN32_SHARE_PROCESS, and the service is running in the context of the LocalSystem account, the following type may also be specified.
| Value | Meaning |
|---|---|
|
The service can interact with the desktop.
For more information, see Interactive Services. |
dwStartType
When to start the service. This member can be one of the following values.
| Value | Meaning |
|---|---|
|
A service started automatically by the service control manager during system startup. |
|
A device driver started by the system loader. This value is valid only for driver services. |
|
A service started by the service control manager when a process calls the StartService function. |
|
A service that cannot be started. Attempts to start the service result in the error code ERROR_SERVICE_DISABLED. |
|
A device driver started by the IoInitSystem function. This value is valid only for driver services. |
dwErrorControl
The severity of the error, and action taken, if this service fails to start. This member can be one of the following values.
lpBinaryPathName
The fully qualified path to the service binary file.
The path can also include arguments for an auto-start service. These arguments are passed to the service entry point (typically the main function).
lpLoadOrderGroup
The name of the load ordering group to which this service belongs. If the member is NULL or an empty string, the service does not belong to a load ordering group.
The startup program uses load ordering groups to load groups of services in a specified order with respect to the other groups. The list of load ordering groups is contained in the following registry value:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\ServiceGroupOrder
dwTagId
A unique tag value for this service in the group specified by the lpLoadOrderGroup parameter. A value of zero indicates that the service has not been assigned a tag. You can use a tag for ordering service startup within a load order group by specifying a tag order vector in the registry located at:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\GroupOrderList
Tags are only evaluated for SERVICE_KERNEL_DRIVER and SERVICE_FILE_SYSTEM_DRIVER type services that have SERVICE_BOOT_START or SERVICE_SYSTEM_START start types.
lpDependencies
A pointer to an array of null-separated names of services or load ordering groups that must start before this service. The array is doubly null-terminated. If the pointer is NULL or if it points to an empty string, the service has no dependencies. If a group name is specified, it must be prefixed by the SC_GROUP_IDENTIFIER (defined in WinSvc.h) character to differentiate it from a service name, because services and service groups share the same name space. Dependency on a service means that this service can only run if the service it depends on is running. Dependency on a group means that this service can run if at least one member of the group is running after an attempt to start all members of the group.
lpServiceStartName
If the service type is SERVICE_WIN32_OWN_PROCESS or SERVICE_WIN32_SHARE_PROCESS, this member is the name of the account that the service process will be logged on as when it runs. This name can be of the form Domain\UserName. If the account belongs to the built-in domain, the name can be of the form .\UserName. The name can also be "LocalSystem" if the process is running under the LocalSystem account.
If the service type is SERVICE_KERNEL_DRIVER or SERVICE_FILE_SYSTEM_DRIVER, this member is the driver object name (that is, \FileSystem\Rdr or \Driver\Xns) which the input and output (I/O) system uses to load the device driver. If this member is NULL, the driver is to be run with a default object name created by the I/O system, based on the service name.
lpDisplayName
The display name to be used by service control programs to identify the service. This string has a maximum length of 256 characters. The name is case-preserved in the service control manager. Display name comparisons are always case-insensitive.
This parameter can specify a localized string using the following format:
@[Path]DLLName,-StrID
The string with identifier StrID is loaded from DLLName; the Path is optional. For more information, see RegLoadMUIString.
Windows Server 2003 and Windows XP: Localized strings are not supported until Windows Vista.
Remarks
The configuration information for a service is initially specified when the service is created by a call to the CreateService function. The information can be modified by calling the ChangeServiceConfig function.
Examples
For an example, see Querying a Service's Configuration.
Note
The winsvc.h header defines QUERY_SERVICE_CONFIG as an alias that automatically selects the ANSI or Unicode version of this function based on the definition of the UNICODE preprocessor constant. Mixing usage of the encoding-neutral alias with code that is not encoding-neutral can lead to mismatches that result in compilation or runtime errors. For more information, see Conventions for Function Prototypes.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows XP [desktop apps only] |
| Minimum supported server | Windows Server 2003 [desktop apps only] |
| Header | winsvc.h (include Windows.h) |