diff --git a/configure.ac b/configure.ac
index 3cd859c..0ca716a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -335,6 +335,15 @@ if test "$app_cv_pic" == "yes"; then
 fi
 
 dnl ---------------------------------------------------------------------------
+dnl Enable/Disable trace file
+dnl ---------------------------------------------------------------------------
+AC_ARG_ENABLE([trace],[AS_HELP_STRING([--enable-trace], [Enable creation of trace file])],[app_cv_trace="$enableval"],[app_cv_trace="no"])
+
+if test "$app_cv_trace" == "yes"; then
+	AC_DEFINE(ENABLE_TRACE_TO_FILE)
+fi
+
+dnl ---------------------------------------------------------------------------
 dnl Output config
 dnl ---------------------------------------------------------------------------
 
diff --git a/pw3270-sharp.cbp b/pw3270-sharp.cbp
index 24c7894..e27a8ec 100644
--- a/pw3270-sharp.cbp
+++ b/pw3270-sharp.cbp
@@ -43,6 +43,7 @@
 		<Linker>
 			<Add library="pw3270cpp" />
 		</Linker>
+		<Unit filename="src/include/config.h.in" />
 		<Unit filename="src/native/actions.cc" />
 		<Unit filename="src/native/get.cc" />
 		<Unit filename="src/native/init.cc" />
diff --git a/src/include/config.h.in b/src/include/config.h.in
index da383ba..a7cbdba 100644
--- a/src/include/config.h.in
+++ b/src/include/config.h.in
@@ -43,5 +43,12 @@
 	 */
 	#undef HAVE_GNUC_VISIBILITY
 
+	/**
+	 * @brief Ativa trace em um arquivo texto.
+	 *
+	 */
+	#undef ENABLE_TRACE_TO_FILE
+
+
 
 #endif // CONFIG_H_INCLUDED
diff --git a/src/native/Makefile.in b/src/native/Makefile.in
index ed9f169..98f7b0c 100644
--- a/src/native/Makefile.in
+++ b/src/native/Makefile.in
@@ -67,7 +67,7 @@ CC=@CC@
 LD=@CXX@
 
 LIBS=-lpw3270cpp @LIBS@ @LIBICONV@
-CFLAGS=@CFLAGS@
+CFLAGS=-I../include @CFLAGS@
 LDFLAGS=@LDFLAGS@
 
 #---[ Rules ]----------------------------------------------------------------------------
diff --git a/src/native/get.cc b/src/native/get.cc
index c95c337..d9967c2 100644
--- a/src/native/get.cc
+++ b/src/native/get.cc
@@ -63,6 +63,8 @@
 
  int tn3270_get_cstate(h3270::session *ses) {
 
+ 	trace_to_file("%s: %d",__FUNCTION__,(int) ses->get_cstate());
+
 	try {
 		return (int) ses->get_cstate();
  	} catch(std::exception &e) {
diff --git a/src/native/init.cc b/src/native/init.cc
index 4db5deb..5a8d01a 100644
--- a/src/native/init.cc
+++ b/src/native/init.cc
@@ -42,6 +42,9 @@
  *
  */
  h3270::session * tn3270_create_session(const char *name) {
+
+ 	trace_to_file("%s(%s)",__FUNCTION__,name ? name : "");
+
  	try {
 		return h3270::session::create(name);
  	} catch(std::exception &e) {
@@ -55,6 +58,9 @@
   *
   */
  int tn3270_destroy_session(h3270::session *ses) {
+
+ 	trace_to_file("%s",__FUNCTION__);
+
  	try {
 		delete ses;
  	} catch(std::exception &e) {
@@ -64,3 +70,23 @@
 	return 0;
  }
 
+#ifdef ENABLE_TRACE_TO_FILE
+ void write_trace(const char *fmt, ...) {
+
+	FILE *trace = fopen(PACKAGE_NAME ".trace","a");
+	if(trace) {
+		va_list arg_ptr;
+		va_start(arg_ptr, fmt);
+		vfprintf(trace, fmt, arg_ptr);
+		fprintf(trace,"\n");
+		va_end(arg_ptr);
+		fclose(trace);
+	}
+#ifdef DEBUG
+	else {
+		perror(PACKAGE_NAME ".trace");
+	}
+#endif // DEBUG
+
+ }
+#endif // ENABLE_TRACE_TO_FILE
diff --git a/src/native/private.h b/src/native/private.h
index 1ec70fc..26ede0e 100644
--- a/src/native/private.h
+++ b/src/native/private.h
@@ -35,6 +35,8 @@
 
 	#define PRIVATE_H_INCLUDED
 
+	#include <config.h>
+
 	#if defined(_WIN32)
 
 		#include <windows.h>
@@ -63,6 +65,13 @@
 		#define debug( fmt, ... )	/* */
 	#endif // DEBUG
 
+	#ifdef ENABLE_TRACE_TO_FILE
+		DLL_PRIVATE void write_trace(const char *fmt, ...);
+		#define trace_to_file( ... )	write_trace(__VA_ARGS__)
+	#else
+		#define trace( ... )	/* */
+	#endif // ENABLE_TRACE_TO_FILE
+
 	#include <pw3270cpp.h>
 	#include <cerrno>
 	#include <cstring>
diff --git a/src/native/screen.cc b/src/native/screen.cc
index c778c75..710c8f5 100644
--- a/src/native/screen.cc
+++ b/src/native/screen.cc
@@ -70,6 +70,7 @@ int tn3270_get_string_at(h3270::session *ses, int row, int col, char* str, int s
 	try {
 		memset(str,0,sz+1);
 		strncpy(str,ses->get_string_at(row,col,sz).c_str(),sz);
+		trace_to_file("%s(%d,%d,%d):\n%s\n",__FUNCTION__,row,col,sz,str);
 	} catch(std::exception &e) {
 		tn3270_lasterror = e.what();
 		return -1;
@@ -79,6 +80,7 @@ int tn3270_get_string_at(h3270::session *ses, int row, int col, char* str, int s
 
 int tn3270_set_string_at(h3270::session *ses, int row, int col, const char* str) {
 	try {
+		trace_to_file("%s(%d,%d):\n%s\n",__FUNCTION__,row,col,str);
 		debug("%s(%d,%d,\"%s\")",__FUNCTION__,row,col,str);
 		ses->set_string_at(row,col,str);
 	} catch(std::exception &e) {
diff --git a/src/native/set.cc b/src/native/set.cc
index 7249194..3db2c77 100644
--- a/src/native/set.cc
+++ b/src/native/set.cc
@@ -63,6 +63,7 @@ int tn3270_set_cursor_addr(h3270::session *ses, int addr) {
 
 int tn3270_set_charset(h3270::session *ses, const char* str) {
 	try {
+		trace_to_file("%s: \"%s\" -> \"%s\"",__FUNCTION__,ses->get_display_charset().c_str(),str);
 		ses->set_display_charset(NULL, str);
 	} catch(std::exception &e) {
 		tn3270_lasterror = e.what();
--
libgit2 0.21.2