diff --git a/odbc.go b/odbc.go
index 09b3d11..4027d9d 100644
--- a/odbc.go
+++ b/odbc.go
@@ -265,7 +265,7 @@ func (conn *Connection) Close() *ODBCError {
 }
 
 func (stmt *Statement) RowsAffected() (int, *ODBCError) {
-	var nor C.SQLINTEGER
+	var nor C.SQLLEN
 	ret := C.SQLRowCount(C.SQLHSTMT(stmt.handle), &nor)
 	if !Success(ret) {
 		err := FormatError(C.SQL_HANDLE_STMT, stmt.handle, int(ret))
@@ -421,14 +421,14 @@ func (stmt *Statement) FetchOne() (*Row, *ODBCError) {
 }
 
 func (stmt *Statement) GetField(field_index int) (v interface{}, ftype int, flen int, err *ODBCError) {
-	var field_type C.int
-	var field_len C.int
+	var field_type C.SQLLEN
+	var field_len C.SQLLEN
 	var ll C.SQLSMALLINT
-	ret := C.SQLColAttribute(C.SQLHSTMT(stmt.handle), C.SQLUSMALLINT(field_index+1), C.SQL_DESC_CONCISE_TYPE, C.SQLPOINTER(unsafe.Pointer(uintptr(0))), C.SQLSMALLINT(0), &ll, C.SQLPOINTER(unsafe.Pointer(&field_type)))
+	ret := C.SQLColAttribute(C.SQLHSTMT(stmt.handle), C.SQLUSMALLINT(field_index+1), C.SQL_DESC_CONCISE_TYPE, C.SQLPOINTER(unsafe.Pointer(uintptr(0))), C.SQLSMALLINT(0), &ll, &field_type)
 	if !Success(ret) {
 		debugPrint("GetFiled type Error")
 	}
-	ret = C.SQLColAttribute(C.SQLHSTMT(stmt.handle), C.SQLUSMALLINT(field_index+1), C.SQL_DESC_LENGTH, C.SQLPOINTER(unsafe.Pointer(uintptr(0))), C.SQLSMALLINT(0), &ll, C.SQLPOINTER(unsafe.Pointer(&field_len)))
+	ret = C.SQLColAttribute(C.SQLHSTMT(stmt.handle), C.SQLUSMALLINT(field_index+1), C.SQL_DESC_LENGTH, C.SQLPOINTER(unsafe.Pointer(uintptr(0))), C.SQLSMALLINT(0), &ll, &field_len)
 	if !Success(ret) {
 		debugPrint("GetFiled len Error")
 	}
@@ -452,12 +452,12 @@ func (stmt *Statement) GetField(field_index int) (v interface{}, ftype int, flen
 		}
 	case C.SQL_WCHAR, C.SQL_WVARCHAR, C.SQL_WLONGVARCHAR:
 		value := make([]uint16, int(field_len)+8)
-		ret = C.SQLGetData(C.SQLHSTMT(stmt.handle), C.SQLUSMALLINT(field_index+1), C.SQL_C_WCHAR, C.SQLPOINTER(unsafe.Pointer(&value[0])), C.SQLINTEGER(int(field_len)+4), &fl)
+		ret = C.SQLGetData(C.SQLHSTMT(stmt.handle), C.SQLUSMALLINT(field_index+1), C.SQL_C_WCHAR, C.SQLPOINTER(unsafe.Pointer(&value[0])), C.SQLLEN(int(field_len)+4), &fl)
 		s := UTF16ToString(value)
 		v = s
 	default:
 		value := make([]byte, int(fl)+2)
-		ret = C.SQLGetData(C.SQLHSTMT(stmt.handle), C.SQLUSMALLINT(field_index+1), C.SQL_C_CHAR, C.SQLPOINTER(unsafe.Pointer(&value[0])), C.SQLINTEGER(int(field_len)+4), &fl)
+		ret = C.SQLGetData(C.SQLHSTMT(stmt.handle), C.SQLUSMALLINT(field_index+1), C.SQL_C_CHAR, C.SQLPOINTER(unsafe.Pointer(&value[0])), C.SQLLEN(int(field_len)+4), &fl)
 		s := string(value[0:])
 		v = s
 		debugPrint("default type", value, fl, s)
@@ -554,14 +554,14 @@ func (stmt *Statement) BindParam(index int, param interface{}) *ODBCError {
 			StrLen_or_IndPt = 0
 		case reflect.Complex64, reflect.Complex128:
 		case reflect.String:
-			var slen C.SQLUINTEGER = C.SQLUINTEGER(len(v.String()))
+			var slen C.SQLULEN = C.SQLULEN(len(v.String()))
 			ParameterType = C.SQL_VARCHAR
 			ValueType = C.SQL_C_CHAR
 			s := []byte(v.String())
 			ParameterValuePtr = C.SQLPOINTER(unsafe.Pointer(&s[0]))
 			ColumnSize = slen
-			BufferLength = C.SQLINTEGER(slen + 1)
-			StrLen_or_IndPt = C.SQLINTEGER(slen)
+			BufferLength = C.SQLLEN(slen + 1)
+			StrLen_or_IndPt = C.SQLLEN(slen)
 		default:
 			debugPrint("Not support type", v)
 		}