Add db_set_charset() support for the mssql driver
diff --git a/system/database/drivers/mssql/mssql_driver.php b/system/database/drivers/mssql/mssql_driver.php
index faa1e26..d3e439d 100644
--- a/system/database/drivers/mssql/mssql_driver.php
+++ b/system/database/drivers/mssql/mssql_driver.php
@@ -298,6 +298,19 @@
 	// --------------------------------------------------------------------
 
 	/**
+	 * Set client character set
+	 *
+	 * @param	string	$charset
+	 * @return	bool
+	 */
+	protected function _db_set_charset($charset)
+	{
+		return (@ini_set('mssql.charset', $charset) !== FALSE);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
 	 * Version number query string
 	 *
 	 * @return	string
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 98a4a42..9ca01d8 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -157,6 +157,7 @@
 	 - Added escaping with *QUOTE_IDENTIFIER* setting detection.
 	 - Added port handling support for UNIX-based systems (MSSQL driver).
 	 - Added *OFFSET* support for SQL Server 2005 and above.
+	 - Added ``db_set_charset()`` support (MSSQL driver).
    -  Improved support of the Oracle (OCI8) driver, including:
 	 - Added DSN string support (Easy Connect and TNS).
 	 - Added support for ``drop_table()`` in :doc:`Database Forge <database/forge>`.