diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9c94a87..2c1a9ee 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -23,6 +23,11 @@ endif(FORT_CXX_BUILD)
 set(CMAKE_VERBOSE_MAKEFILE ON)
 
 
+# ------------------------------------------------------------------------------
+# Add WChar support for the build
+# ------------------------------------------------------------------------------
+add_definitions(-DFT_CONGIG_HAVE_WCHAR)
+
 # ------------------------------------------------------------------------------
 # Includes
 # ------------------------------------------------------------------------------
@@ -33,6 +38,7 @@ include_directories(src)
 
 
 
+
 # ------------------------------------------------------------------------------
 # Warnings
 # ------------------------------------------------------------------------------
diff --git a/include/fort.h b/include/fort.h
index ff1b663..5790ab8 100644
--- a/include/fort.h
+++ b/include/fort.h
@@ -32,10 +32,19 @@ SOFTWARE.
 #include <stdint.h>
 #include <limits.h>
 
-
-/*
- * Determine compiler
+/*****************************************************************************
+ *               Configuration
+ *****************************************************************************/
+/**
+ * libfort configuration macros
+ * (to enable/disable some options this macros should be defined/undefined)
  */
+/** #define FT_CONGIG_HAVE_WCHAR */
+
+
+/*****************************************************************************
+ *               Determine compiler
+ *****************************************************************************/
 #if defined(__clang__)
 #define FT_CLANG_COMPILER
 #elif defined(__GNUC__)
@@ -46,11 +55,9 @@ SOFTWARE.
 #define FT_UNDEFINED_COMPILER
 #endif
 
-
-
-/*
- * Declare restrict
- */
+/*****************************************************************************
+ *               Declare restrict
+ *****************************************************************************/
 /*
 #if defined(__cplusplus)
 #if defined(FT_CLANG_COMPILER)
@@ -67,10 +74,9 @@ SOFTWARE.
 #endif // if defined(__cplusplus)
 */
 
-
-/*
- * Declare restrict
- */
+/*****************************************************************************
+ *               Declare inline
+ *****************************************************************************/
 #if defined(__cplusplus)
 #define FT_INLINE inline
 #else
@@ -79,9 +85,9 @@ SOFTWARE.
 
 
 
-/*
- * Attribute format for argument checking
- */
+/*****************************************************************************
+ *               Attribute format for argument checking
+ *****************************************************************************/
 #if defined(FT_CLANG_COMPILER) || defined(FT_GCC_COMPILER)
 #define FT_PRINTF_ATTRIBUTE_FORMAT(string_index, first_to_check) \
     __attribute__ ((format (printf, string_index, first_to_check)))
@@ -90,9 +96,9 @@ SOFTWARE.
 #endif /* defined(FT_CLANG_COMPILER) || defined(FT_GCC_COMPILER) */
 
 
-/*
- *  C++ needs to know that types and declarations are C, not C++.
- */
+/*****************************************************************************
+ *    C++ needs to know that types and declarations are C, not C++.
+ *****************************************************************************/
 #ifdef __cplusplus
 # define FT_BEGIN_DECLS extern "C" {
 # define FT_END_DECLS }
@@ -109,7 +115,7 @@ SOFTWARE.
 
 /*****************************************************************************
  *               RETURN CODES
- * ***************************************************************************/
+ *****************************************************************************/
 typedef int fort_status_t;
 #define FT_SUCCESS        0
 #define FT_MEMORY_ERROR   -1
@@ -118,15 +124,18 @@ typedef int fort_status_t;
 #define IS_SUCCESS(arg) ((arg) >= 0)
 #define IS_ERROR(arg) ((arg) < 0)
 
+/*****************************************************************************
+ *               Wchar support
+ *****************************************************************************/
 
-/*
- *  Wchar support
- */
+#if defined(FT_CONGIG_HAVE_WCHAR)
 #define FT_HAVE_WCHAR
+#endif
 
-/*
- * Helper macros
- */
+
+/*****************************************************************************
+ *               Helper macros
+ *****************************************************************************/
 
 #define STR_2_CAT_(arg1, arg2) \
     arg1##arg2
@@ -195,9 +204,11 @@ static FT_INLINE int ft_check_if_wstring_helper(const wchar_t *str)
     CHECK_IF_ARGS_ARE_STRINGS_(ft_check_if_wstring_helper,CHECK_IF_STRING_,PP_NARG(__VA_ARGS__), __VA_ARGS__)
 #endif
 
-/*
- * libfort structures and functions declarations
- */
+
+/*****************************************************************************
+ *                   libfort API
+ *****************************************************************************/
+
 
 FT_BEGIN_DECLS
 
@@ -208,8 +219,7 @@ typedef struct fort_table FTABLE;
  * Create formatted table.
  *
  * @return
- *   The pointer to the new allocated FTABLE, on success. NULL on error
- *   with ft_errno set appropriately.
+ *   The pointer to the new allocated FTABLE, on success. NULL on error.
  */
 FT_EXTERN FTABLE *ft_create_table(void);
 
@@ -220,7 +230,8 @@ FT_EXTERN FTABLE *ft_create_table(void);
  * and work with it.
  *
  * @param table
- *   Pointer to formatted table previousley created with ft_create_table.
+ *   Pointer to formatted table previousley created with ft_create_table. If
+ *   table is a null pointer, the function does nothing.
  */
 FT_EXTERN void ft_destroy_table(FTABLE *table);
 
@@ -231,12 +242,78 @@ FT_EXTERN void ft_destroy_table(FTABLE *table);
  *   Pointer to formatted table.
  */
 FT_EXTERN void ft_ln(FTABLE *table);
+
+/**
+ * Get row number of the current cell
+ *
+ * @param table
+ *   Pointer to formatted table.
+ * @return
+ *   Row number of the current cell
+ */
 FT_EXTERN size_t ft_cur_row(FTABLE *table);
+
+/**
+ * Get column number of the current cell
+ *
+ * @param table
+ *   Pointer to formatted table.
+ * @return
+ *   Column number of the current cell
+ */
 FT_EXTERN size_t ft_cur_col(FTABLE *table);
 
 
 #if defined(FT_CLANG_COMPILER) || defined(FT_GCC_COMPILER)
+
+/**
+ * Writes data formatted acording to the format string to a variety of table
+ * cells.
+ *
+ * @param table
+ *   Pointer to formatted table.
+ * @param fmt
+ *   Pointer to a null-terminated multibyte string specifying how to interpret
+ *   the data. The format string consists of ordinary characters (except % and |),
+ *   which are copied unchanged into the output stream, and conversion
+ *   specifications. Conversion specifications are the same as for standard
+ *   printf function. Character '|' in the format string is treated as a cell
+ *   separator.
+ * @param ...
+ *   Arguments specifying data to print. Similarly to standard printf-like
+ *   functions if any argument after default conversions is not the type
+ *   expected by the corresponding conversion specifier, or if there are fewer
+ *   arguments than required by format, the behavior is undefined. If there are
+ *   more arguments than required by format, the extraneous arguments are
+ *   evaluated and ignored.
+ * @return
+ *   todo ?????
+ */
 FT_EXTERN int ft_printf(FTABLE *table, const char *fmt, ...) FT_PRINTF_ATTRIBUTE_FORMAT(2, 3);
+
+/**
+ * Writes data formatted acording to the format string to a variety of table
+ * cells and moves current position to the first cell of the next line(row).
+ *
+ * @param table
+ *   Pointer to formatted table.
+ * @param fmt
+ *   Pointer to a null-terminated multibyte string specifying how to interpret
+ *   the data. The format string consists of ordinary characters (except % and |),
+ *   which are copied unchanged into the output stream, and conversion
+ *   specifications. Conversion specifications are the same as for standard
+ *   printf function. Character '|' in the format string is treated as a cell
+ *   separator.
+ * @param ...
+ *   Arguments specifying data to print. Similarly to standard printf-like
+ *   functions if any argument after default conversions is not the type
+ *   expected by the corresponding conversion specifier, or if there are fewer
+ *   arguments than required by format, the behavior is undefined. If there are
+ *   more arguments than required by format, the extraneous arguments are
+ *   evaluated and ignored.
+ * @return
+ *   todo ?????
+ */
 FT_EXTERN int ft_printf_ln(FTABLE *table, const char *fmt, ...) FT_PRINTF_ATTRIBUTE_FORMAT(2, 3);
 
 #else
@@ -300,9 +377,11 @@ FT_EXTERN int ft_add_separator(FTABLE *table);
  *
  * FTABLE has ownership of the returned pointer. So there is no need to
  * free it. To take ownership user should explicitly copy the returned
- * string with strdup or similar functions. Returned pointer remaines valid
- * until table is destroyed with ft_destroy_table or other invocations of
- * ft_to_string.
+ * string with strdup or similar functions.
+ *
+ * Returned pointer may be later invalidated by:
+ * - Calling ft_destroy_table
+ * - Other invocations of ft_to_string
  *
  * @param table
  *   Formatted table.
@@ -324,7 +403,9 @@ FT_EXTERN const char *ft_to_string(const FTABLE *table);
 
 
 
-
+/**
+ * Structure describing border appearance
+ */
 struct ft_border_chars {
     char top_border_ch;
     char separator_ch;
@@ -334,6 +415,9 @@ struct ft_border_chars {
     char in_intersect_ch;
 };
 
+/**
+ * Structure describing border style
+ */
 struct ft_border_style {
     struct ft_border_chars border_chs;
     struct ft_border_chars header_border_chs;
@@ -479,13 +563,23 @@ FT_EXTERN int ft_set_default_tbl_option(uint32_t option, int value);
 FT_EXTERN int ft_set_tbl_option(FTABLE *table, uint32_t option, int value);
 
 
+/**
+ * Set functions for memory allocation and deallocation to be used instead of
+ * standard ones.
+ *
+ * @param f_malloc
+ *   Pointer to a function for memory allocation that should be used instead of
+ *   malloc.
+ * @param f_free
+ *   Pointer to a function for memory deallocation that should be used instead
+ *   of free.
+ * @note
+ *   To return memory allocation/deallocation functions to their standard values
+ *   set f_malloc and f_free to NULL.
+ */
 FT_EXTERN void ft_set_memory_funcs(void *(*f_malloc)(size_t size), void (*f_free)(void *ptr));
 
 
-/*
- * WChar support
- */
-
 #ifdef FT_HAVE_WCHAR
 
 FT_EXTERN int ft_wwrite(FTABLE *table, const wchar_t *cell_content);
diff --git a/src/fort_impl.h b/src/fort_impl.h
index 95f06ed..0da5f98 100644
--- a/src/fort_impl.h
+++ b/src/fort_impl.h
@@ -8,6 +8,10 @@
 #include <stdio.h>
 #include "fort.h"
 
+#if defined(FT_MICROSOFT_COMPILER)
+#define _CRT_SECURE_NO_WARNINGS /* To disable warnings for unsafe functions */
+#endif
+
 #define FORT_COL_SEPARATOR '|'
 
 #define FORT_UNUSED  __attribute__((unused))
diff --git a/tests/test.c b/tests/test.c
index 871c884..f9ae571 100644
--- a/tests/test.c
+++ b/tests/test.c
@@ -7,7 +7,9 @@ struct test_case test_suit [] = {
     {"test_table_sizes", test_table_sizes},
     {"test_table_geometry", test_table_geometry},
     {"test_table_basic", test_table_basic},
+#ifdef FT_HAVE_WCHAR
     {"test_wcs_table_boundaries", test_wcs_table_boundaries},
+#endif
     {"test_table_write", test_table_write},
     {"test_table_border_style", test_table_border_style},
     {"test_table_cell_options", test_table_cell_options},
diff --git a/tests/test_table_basic.c b/tests/test_table_basic.c
index 12cc235..d028807 100644
--- a/tests/test_table_basic.c
+++ b/tests/test_table_basic.c
@@ -35,6 +35,7 @@ void test_table_basic(void)
         ft_destroy_table(table);
     }
 
+#ifdef FT_HAVE_WCHAR
     WHEN("All columns are equal and not empty (wide strings)") {
         table = ft_create_table();
         assert_true(table != NULL);
@@ -64,6 +65,7 @@ void test_table_basic(void)
         assert_wcs_equal(table_str, table_str_etalon);
         ft_destroy_table(table);
     }
+#endif
 
 
 
@@ -97,6 +99,7 @@ void test_table_basic(void)
         ft_destroy_table(table);
     }
 
+#ifdef FT_HAVE_WCHAR
     WHEN("All columns are not equal and not empty (wide strings)") {
         table = ft_create_table();
         assert_true(table != NULL);
@@ -126,6 +129,7 @@ void test_table_basic(void)
         assert_wcs_equal(table_str, table_str_etalon);
         ft_destroy_table(table);
     }
+#endif
 
     WHEN("All columns are not equal and some cells are empty") {
         table = ft_create_table();
@@ -157,6 +161,7 @@ void test_table_basic(void)
         ft_destroy_table(table);
     }
 
+#ifdef FT_HAVE_WCHAR
     WHEN("All columns are not equal and some cells are empty (wide strings)") {
         table = ft_create_table();
         assert_true(table != NULL);
@@ -186,6 +191,7 @@ void test_table_basic(void)
         assert_wcs_equal(table_str, table_str_etalon);
         ft_destroy_table(table);
     }
+#endif
 
     WHEN("All cells are empty") {
         table = ft_create_table();
@@ -217,6 +223,7 @@ void test_table_basic(void)
         ft_destroy_table(table);
     }
 
+#ifdef FT_HAVE_WCHAR
     WHEN("All cells are empty (wide strings)") {
         table = ft_create_table();
         assert_true(table != NULL);
@@ -246,11 +253,12 @@ void test_table_basic(void)
         assert_wcs_equal(table_str, table_str_etalon);
         ft_destroy_table(table);
     }
+#endif
 }
 
 
 
-
+#ifdef FT_HAVE_WCHAR
 void test_wcs_table_boundaries(void)
 {
     FTABLE *table = NULL;
@@ -285,6 +293,7 @@ void test_wcs_table_boundaries(void)
         ft_destroy_table(table);
     }
 }
+#endif
 
 
 void test_table_write(void)
@@ -332,6 +341,7 @@ void test_table_write(void)
         ft_destroy_table(table);
     }
 
+#ifdef FT_HAVE_WCHAR
     SCENARIO("Test wwrite functions(wide strings)") {
         table = ft_create_table();
         assert_true(table != NULL);
@@ -372,6 +382,7 @@ void test_table_write(void)
         assert_wcs_equal(table_str, table_str_etalon);
         ft_destroy_table(table);
     }
+#endif
 
     SCENARIO("Test nwrite functions") {
         table = ft_create_table();
@@ -404,6 +415,7 @@ void test_table_write(void)
         ft_destroy_table(table);
     }
 
+#ifdef FT_HAVE_WCHAR
     SCENARIO("Test nwwrite functions(wide strings)") {
         table = ft_create_table();
         assert_true(table != NULL);
@@ -434,6 +446,7 @@ void test_table_write(void)
         assert_wcs_equal(table_str, table_str_etalon);
         ft_destroy_table(table);
     }
+#endif
 
 
     SCENARIO("Test row_write functions") {
@@ -470,6 +483,7 @@ void test_table_write(void)
         ft_destroy_table(table);
     }
 
+#ifdef FT_HAVE_WCHAR
     SCENARIO("Test row_write functions(wide strings)") {
         table = ft_create_table();
         assert_true(table != NULL);
@@ -503,6 +517,7 @@ void test_table_write(void)
         assert_wcs_equal(table_str, table_str_etalon);
         ft_destroy_table(table);
     }
+#endif
 
 
     SCENARIO("Test printf functions") {
diff --git a/tests/test_table_options.c b/tests/test_table_options.c
index 0ec1464..1dd0475 100644
--- a/tests/test_table_options.c
+++ b/tests/test_table_options.c
@@ -70,6 +70,9 @@ void test_table_tbl_options(void)
     }
 
 
+
+
+#ifdef FT_HAVE_WCHAR
     WHEN("Test setting entire table options(wide strings case)") {
         set_test_options_as_default();
 
@@ -125,6 +128,7 @@ void test_table_tbl_options(void)
 
         ft_destroy_table(table);
     }
+#endif
 }
 
 
diff --git a/tests/test_utility.c b/tests/test_utility.c
index 945f66f..fbb1c41 100644
--- a/tests/test_utility.c
+++ b/tests/test_utility.c
@@ -33,7 +33,7 @@ int set_test_options_for_table(FTABLE *table)
     return ft_set_border_style(table, &brdr_style);
 }
 
-int set_test_options_as_default()
+int set_test_options_as_default(void)
 {
     int status = FT_SUCCESS;
 
@@ -101,6 +101,7 @@ FTABLE *create_test_int_table(int set_test_opts)
     return table;
 }
 
+#ifdef FT_HAVE_WCHAR
 FTABLE *create_test_int_wtable(int set_test_opts)
 {
     FTABLE *table = NULL;
@@ -130,3 +131,4 @@ FTABLE *create_test_int_wtable(int set_test_opts)
 
     return table;
 }
+#endif
diff --git a/tests/tests.h b/tests/tests.h
index bac3c5d..9059908 100644
--- a/tests/tests.h
+++ b/tests/tests.h
@@ -19,7 +19,9 @@ void test_string_buffer(void);
 void test_table_sizes(void);
 void test_table_geometry(void);
 void test_table_basic(void);
+#ifdef FT_HAVE_WCHAR
 void test_wcs_table_boundaries(void);
+#endif
 void test_table_write(void);
 void test_table_border_style(void);
 void test_table_cell_options(void);
@@ -60,7 +62,7 @@ struct test_case
     }
 
 int set_test_options_for_table(FTABLE *table);
-int set_test_options_as_default();
+int set_test_options_as_default(void);
 FTABLE *create_test_int_table(int set_test_opts);
 FTABLE *create_test_int_wtable(int set_test_opts);