diff --git a/src/TicTacToe.h b/src/TicTacToe.h
index 307e405..69ec390 100644
--- a/src/TicTacToe.h
+++ b/src/TicTacToe.h
@@ -438,7 +438,8 @@ namespace TicTacToe {
 
 		}
 #pragma endregion
-	array<Button^>^ buttons = gcnew array<Button^>(11); // Array of buttons
+	// Array containing the buttons to place O and X.
+	array<Button^>^ buttons = gcnew array<Button^>(11);
 
 	private: System::Void button_click(System::Object^ sender, System::EventArgs^ e) { // Buttons to place O and X
 		is_match(sender, buttons, label2);
diff --git a/src/game.cpp b/src/game.cpp
index 7f56381..4e45b6b 100644
--- a/src/game.cpp
+++ b/src/game.cpp
@@ -28,9 +28,18 @@ using namespace System::Windows::Forms;
 using namespace System::Data;
 using namespace System::Drawing;
 
-int turn = 0; // Whether to choose if the X or the O will place.
-bool match_ended = false; // If the match has ended or not.
+int turn = 0;
+bool match_ended = false;
 
+/**
+ * @brief The function to determine if it's a match or not
+ * Also updates the text of the buttons when clicking on them,
+ * the current turn, and a label that shows who's the winner.
+ * @param sender The item that triggered the event
+ * @param buttons An array containing various buttons
+ * @param label2 The label that shows who's the winner
+ * @return void
+*/
 void is_match(System::Object^ sender, array<Button^>^ buttons, Label^ label2) {
 	Button^ button = safe_cast<Button^>(sender);
 
diff --git a/src/game.hpp b/src/game.hpp
index 8e40dba..0c0e1cb 100644
--- a/src/game.hpp
+++ b/src/game.hpp
@@ -19,8 +19,8 @@
 #ifndef GAME_HPP
 #define GAME_HPP
 
-extern int turn;
-extern bool match_ended;
+extern int turn;            // Whether to choose if the X or the O will place.
+extern bool match_ended;    // If the match has ended or not.
 
 void is_match(System::Object^, array<System::Windows::Forms::Button^>^, System::Windows::Forms::Label^);
 
diff --git a/src/menu.cpp b/src/menu.cpp
index f722a45..c0ff868 100644
--- a/src/menu.cpp
+++ b/src/menu.cpp
@@ -25,6 +25,17 @@ using namespace System::Windows::Forms;
 using namespace System::Data;
 using namespace System::Drawing;
 
+/**
+ * @brief Shows the necessary buttons and labels that
+ * lets the user choose who's going to start first.
+ * This function can also hide those elements.
+ * @param turn_o The button that lets the user choose the O to start first
+ * @param turn_x The button that lets the user choose the X to start first
+ * @param label3 A label with the text "Who's going to start first?"
+ * @param backmodeselect A button that lets the user go back to the mode selection
+ * @param mode A boolean that determines if the elements should be shown or not
+ * @return void
+*/
 void choose_turn(Button^ turn_o, Button^ turn_x, Label^ label3, Button^ backmodeselect, bool mode) {
 	if (mode == true) {
 		turn_o->Enabled = true;
@@ -46,6 +57,21 @@ void choose_turn(Button^ turn_o, Button^ turn_x, Label^ label3, Button^ backmode
 	}
 }
 
+/**
+ * @brief Shows the necessary buttons and labels that
+ * lets the user choose the mode of the game.
+ * This function can also hide those elements, and show or hide
+ * the elements called in the `choose_turn` function.
+ * @param multiplayer_mode The button that will choose multiplayer as the current mode
+ * @param ai_mode The button that will choose A.I. as the current mode
+ * @param label4 A label with the text "Choose the mode of the game"
+ * @param turn_o The button that lets the user choose the O to start first
+ * @param turn_x The button that lets the user choose the X to start first
+ * @param backmodeselect A button that lets the user go back to the mode selection	
+ * @param label3 A label with the text "Who's going to start first?"
+ * @param mode A boolean that determines if the elements should be shown or not
+ * @return void
+*/
 void choose_mode(Button^ multiplayer_mode, Button^ ai_mode, Label^ label4, Button^ turn_o, Button^ turn_x, Button^ backmodeselect, Label^ label3, bool mode) {
 	if (mode == true) {
 		multiplayer_mode->Enabled = true;