diff --git a/include/odbcinst.h b/include/odbcinst.h
index aeef3749856..bee34cffc7b 100644
--- a/include/odbcinst.h
+++ b/include/odbcinst.h
@@ -25,6 +25,40 @@ extern "C" {
 
 #include "sql.h"
 
+/* flags for Installer function requests */
+#define ODBC_INSTALL_INQUIRY 	1
+#define ODBC_INSTALL_COMPLETE	2
+
+#define ODBC_INSTALL_DRIVER	1
+#define ODBC_REMOVE_DRIVER	2
+#define ODBC_CONFIG_DRIVER	3
+#define ODBC_CONFIG_DRIVER_MAX  100
+
+/* error values */
+#define ODBC_ERROR_GENERAL_ERR			1
+#define ODBC_ERROR_INVALID_BUFF_LEN		2
+#define ODBC_ERROR_INVALID_HWND			3
+#define ODBC_ERROR_INVALID_STR			4
+#define ODBC_ERROR_INVALID_REQUEST_TYPE		5
+#define ODBC_ERROR_COMPONENT_NOT_FOUND		6
+#define ODBC_ERROR_INVALID_NAME			7
+#define ODBC_ERROR_INVALID_KEYWORD_VALUE	8
+#define ODBC_ERROR_INVALID_DSN			9
+#define ODBC_ERROR_INVALID_INF			10
+#define ODBC_ERROR_REQUEST_FAILED		11
+#define ODBC_ERROR_INVALID_PATH			12
+#define ODBC_ERROR_LOAD_LIB_FAILED		13
+#define ODBC_ERROR_INVALID_PARAM_SEQUENCE	14
+#define ODBC_ERROR_INVALID_LOG_FILE		15
+#define ODBC_ERROR_USER_CANCELED		16
+#define ODBC_ERROR_USAGE_UPDATE_FAILED		17
+#define ODBC_ERROR_CREATE_DSN_FAILED		18
+#define ODBC_ERROR_WRITING_SYSINFO_FAILED	19
+#define ODBC_ERROR_REMOVE_DSN_FAILED		20
+#define ODBC_ERROR_OUT_OF_MEM			21
+#define ODBC_ERROR_OUTPUT_STRING_TRUNCATED	22
+
+
 BOOL WINAPI ODBCCPlApplet(LONG,LONG,LONG*,LONG*);
 BOOL WINAPI SQLConfigDataSource(HWND,WORD,LPCSTR,LPCSTR);
 BOOL WINAPI SQLConfigDataSourceW(HWND,WORD,LPCWSTR,LPCWSTR);