add TextBox.c to README

README.md

@@ -173,3 +173,29 @@ moves mapBuffer to mapData and allocates new mapBuffer; if music was loaded in t
 ###pager()
 
 if the player is warping to a new map chunk, halt the music (if any), unload the current map chunk before pushing mapBuffer to mapData
+
+##TextBox.c
+
+###newTextBox()
+
+returns a pointer to an empty TextBox
+
+###newGTextBox(SDL_Surface* image)
+
+returns a pointer to an empty TextBox, with portarit image
+
+###deleteTextBox(TextBox* target)
+
+deallocates memory for target
+
+###addText(TextBox* self, char* text)
+
+adds the string of text as a line in the TextBox pointed to by self
+
+###textBoxInput(TextBox* self, int* textIsRelevent)
+
+increments TextBox cursor, handles keyboard input while TextBox is onscreen
+
+###displayTextBox(TextBox* self)
+
+takes control of the main loop and draws the room, foreground, and the TextBox over it all, and passes input to textBoxInput()