diff --git a/include/dmenu-dialog.h b/include/dmenu-dialog.h
index fad7dc03..4f42aa46 100644
--- a/include/dmenu-dialog.h
+++ b/include/dmenu-dialog.h
@@ -10,9 +10,9 @@ extern char *dmenu_prompt;
 /**
  * @param input Pointer to the user-input string.
  *
- * dmenu dialog. 
+ * dmenu dialog.
  *
- * @returns TRUE if script was successful. 
+ * @returns TRUE if script was successful.
  */
 int dmenu_switcher_dialog ( char **input );
 
diff --git a/include/helper.h b/include/helper.h
index 18c47c9a..cc996e64 100644
--- a/include/helper.h
+++ b/include/helper.h
@@ -10,7 +10,7 @@
  * Parses a string into arguments. While replacing keys with values.
  *
  * @returns TRUE when successful, FALSE when failed.
- */ 
+ */
 int helper_parse_setup ( char * string, char ***output, int *length, ... );
 
 /**
@@ -36,7 +36,7 @@ char **tokenize ( const char *input );
  * Parse command line argument 'key' to character.
  * This one supports character escaping.
  *
- * @returns TRUE if key was found and val was set. 
+ * @returns TRUE if key was found and val was set.
  */
 int find_arg_char ( const int argc, char * const argv[], const char * const key, char *val );
 
@@ -48,7 +48,7 @@ int find_arg_char ( const int argc, char * const argv[], const char * const key,
  *
  * Parse command line argument 'key' to unsigned int.
  *
- * @returns TRUE if key was found and val was set. 
+ * @returns TRUE if key was found and val was set.
  */
 int find_arg_uint ( const int argc, char * const argv[], const char * const key, unsigned int *val );
 
@@ -60,7 +60,7 @@ int find_arg_uint ( const int argc, char * const argv[], const char * const key,
  *
  * Parse command line argument 'key' to int.
  *
- * @returns TRUE if key was found and val was set. 
+ * @returns TRUE if key was found and val was set.
  */
 int find_arg_int ( const int argc, char * const argv[], const char * const key, int *val );
 
@@ -73,7 +73,7 @@ int find_arg_int ( const int argc, char * const argv[], const char * const key,
  *
  * Parse command line argument 'key' to string.
  *
- * @returns TRUE if key was found and val was set. 
+ * @returns TRUE if key was found and val was set.
  */
 int find_arg_str ( const int argc, char * const argv[], const char * const key, char** val );
 
@@ -84,7 +84,7 @@ int find_arg_str ( const int argc, char * const argv[], const char * const key,
  *
  * Check if key is passed as argument.
  *
- * @returns return position of string or -1 if not found. 
+ * @returns return position of string or -1 if not found.
  */
 int find_arg ( const int argc, char * const argv[], const char * const key );
 
diff --git a/include/run-dialog.h b/include/run-dialog.h
index a11f3755..49701705 100644
--- a/include/run-dialog.h
+++ b/include/run-dialog.h
@@ -1,7 +1,6 @@
 #ifndef __RUN_DIALOG_H__
 #define __RUN_DIALOG_H__
 
-
 /**
  * @param input Pointer to the user-input string.
  * @param data  Custom data pointer for callback.
diff --git a/include/textbox.h b/include/textbox.h
index 7c3e9f4b..e080079b 100644
--- a/include/textbox.h
+++ b/include/textbox.h
@@ -30,9 +30,12 @@ typedef enum
     TB_EDITABLE   = 1 << 19,
 } TextboxFlags;
 
+
 typedef enum
 {
+    // Render font normally
     NORMAL,
+    // Render font highlighted (inverted colors.)
     HIGHLIGHT,
 } TextBoxFontType;
 
@@ -52,20 +55,73 @@ void textbox_free ( textbox *tb );
  * @param tb  Handle to the textbox
  * @param tbft The style of font to render.
  *
- * Set the font render style. 
+ * Set the font render style.
  */
 void textbox_font ( textbox *tb, TextBoxFontType tbft );
 
+/**
+ * @param tb  Handle to the textbox
+ * @param text The text to show in the textbox
+ *
+ * Set the text to show. Cursor is moved to end (if visible)
+ */
 void textbox_text ( textbox *tb, char *text );
+
+/**
+ * @param tb  Handle to the textbox
+ *
+ * Show the textbox (map window)
+ */
 void textbox_show ( textbox *tb );
+
+/**
+ * @param tb  Handle to the textbox
+ *
+ * Render the textbox.
+ */
 void textbox_draw ( textbox *tb );
 
+/**
+ * @param tb  Handle to the textbox
+ * @param ev  XEvent key inputs to textbox
+ *
+ * Let the textbox handle the input event.
+ *
+ * @returns if the key was handled (1), unhandled(0) or handled and return was pressed (-1)
+ */
 int textbox_keypress ( textbox *tb, XEvent *ev );
 
+/**
+ * @param tb  Handle to the textbox
+ *
+ * Move the cursor to the end of the string.
+ */
 void textbox_cursor_end ( textbox *tb );
+
+/**
+ * @param tb  Handle to the textbox
+ * @param pos New cursor position
+ *
+ * Set the cursor position (string index)
+ */
 void textbox_cursor ( textbox *tb, int pos );
+
+/**
+ * @param tb  Handle to the textbox
+ * @param x   The new x coordinate to move the window to
+ * @param y   The new y coordinate to move the window to
+ *
+ * Move the window to x,y position.
+ */
 void textbox_move ( textbox *tb, int x, int y );
 
+/**
+ * @param tb  Handle to the textbox
+ * @param pos The position to insert the string at
+ * @param str The string to insert.
+ *
+ * Insert the string str at position pos.
+ */
 void textbox_insert ( textbox *tb, int pos, char *str );
 
 /**
@@ -100,18 +156,18 @@ void textbox_cleanup ();
 /**
  * @param tb Handle to the textbox
  *
- * Get the height of the textbox 
+ * Get the height of the textbox
  *
- * @returns the height of the textbox in pixels. 
+ * @returns the height of the textbox in pixels.
  */
 int textbox_get_height ( textbox *tb );
 
 /**
  * @param tb Handle to the textbox
  *
- * Get the width of the textbox 
+ * Get the width of the textbox
  *
- * @returns the width of the textbox in pixels. 
+ * @returns the width of the textbox in pixels.
  */
 int textbox_get_width ( textbox *tb );
 
@@ -120,7 +176,7 @@ int textbox_get_width ( textbox *tb );
  *
  * Get the height of the rendered string.
  *
- * @returns the height of the string in pixels. 
+ * @returns the height of the string in pixels.
  */
 int textbox_get_font_height ( textbox *tb );
 
@@ -129,7 +185,7 @@ int textbox_get_font_height ( textbox *tb );
  *
  * Get the width of the rendered string.
  *
- * @returns the width of the string in pixels. 
+ * @returns the width of the string in pixels.
  */
 int textbox_get_font_width ( textbox *tb );
 
@@ -169,6 +225,13 @@ void textbox_cursor_dec ( textbox *tb );
  */
 void textbox_cursor_inc ( textbox *tb );
 
+/**
+ * @param tb Handle to the textbox
+ * @param pos The start position
+ * @param dlen The length
+ *
+ * Remove dlen bytes from position pos.
+ */
 void textbox_delete ( textbox *tb, int pos, int dlen );
 
 #endif //__TEXTBOX_H__