LocalDBDeleteInstance Function
Applies to: 
SQL Server
Removes the specified SQL Server Express LocalDB instance.
Header file: msoledbsql.h
Syntax
HRESULT LocalDBDeleteInstance(
PCWSTR pInstanceName,
DWORD dwFlags
);
Parameters
pInstanceName
[Input] The name of the LocalDB instance to remove.
dwFlags
[Input] Reserved for future use. Currently should be set to 0.
Returns
S_OK
The function succeeded.
LOCALDB_ERROR_NOT_INSTALLED
SQL Server Express LocalDB is not installed on the computer.
LOCALDB_ERROR_INVALID_PARAMETER
One or more specified input parameters are invalid.
LOCALDB_ERROR_INVALID_INSTANCE_NAME
The specified instance name is invalid.
LOCALDB_ERROR_UNKNOWN_INSTANCE
The specified instance does not exist.
LOCALDB_ERROR_INSTANCE_BUSY
The specified instance is running.
LOCALDB_ERROR_WAIT_TIMEOUT
A time-out occurred while trying to acquire synchronization locks.
LOCALDB_ERROR_INSTANCE_FOLDER_PATH_TOO_LONG
The path where the instance should be stored is longer than MAX_PATH.
LOCALDB_ERROR_CANNOT_GET_USER_PROFILE_FOLDER
A user profile folder cannot be retrieved.
LOCALDB_ERROR_CANNOT_ACCESS_INSTANCE_FOLDER
An instance folder cannot be accessed.
LOCALDB_ERROR_CANNOT_ACCESS_INSTANCE_REGISTRY
An instance registry cannot be accessed.
LOCALDB_ERROR_CANNOT_MODIFY_INSTANCE_REGISTRY
An instance registry cannot be modified.
LOCALDB_ERROR_INSTANCE_CONFIGURATION_CORRUPT
An instance configuration is corrupted.
LOCALDB_ERROR_CALLER_IS_NOT_OWNER
API caller is not Local Database instance owner.
LOCALDB_ERROR_INTERNAL_ERROR
An unexpected error occurred. See the event log for details.
Remarks
For a code sample that uses LocalDB API, see SQL Server Express LocalDB Reference.