The QueryServiceConfig function retrieves the configuration parameters of the specified service.
BOOL QueryServiceConfig(
SC_HANDLE hService, // handle of service
LPQUERY_SERVICE_CONFIG lpServiceConfig,
// address of service config. structure
DWORD cbBufSize, // size of service configuration buffer
LPDWORD pcbBytesNeeded // address of variable for bytes needed
);
If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero. To get extended error information, call GetLastError.
The following error codes can be set by the service control manager. Others can be set by the registry functions that are called by the service control manager.
Value | Meaning |
---|---|
ERROR_ACCESS_DENIED | The specified handle was not opened with SERVICE_QUERY_CONFIG access. |
ERROR_INSUFFICIENT_BUFFER | There is more service configuration information than would fit into the lpServiceConfig buffer. The number of bytes required to get all the information is returned in the pcbBytesNeeded parameter. Nothing is written to the lpServiceConfig buffer. |
ERROR_INVALID_HANDLE | The specified handle is invalid. |
The QueryServiceConfig function returns the service configuration information kept in the registry for a particular service. This configuration information is first set by a service control program using the CreateService function. This information may have been updated by a service configuration program using the ChangeServiceConfig function.
If the service was running when the configuration information was last changed, the information returned by QueryServiceConfig will not reflect the current configuration of the service. Instead, it will reflect the configuration of the service when it is next run. The DisplayName key is an exception to this. When the DisplayName key is changed, it takes effect immediately, regardless of whether the service is running.
Windows NT: Requires version 3.1 or later.
Windows: Unsupported.
Windows CE: Unsupported.
Header: Declared in winsvc.h.
Import Library: Use advapi32.lib.
Unicode: Implemented as Unicode and ANSI versions on Windows NT.
Services Overview, Service Functions, ChangeServiceConfig, CreateService, OpenService, QUERY_SERVICE_CONFIG, QueryServiceObjectSecurity, QueryServiceStatus