Pixel-Composer/objects/o_main/KeyPress_1.gml

/// @description 
kb_hkey = keyboard_key == 0? keyboard_lastkey : keyboard_key;
kb_time = 0;
kb_hold = false;

KEYBOARD_PRESSED = kb_hkey;

if(keyboard_check(vk_backspace))
	KEYBOARD_STRING = string_copy(KEYBOARD_STRING, 1, string_length(KEYBOARD_STRING) - 1);
else
	KEYBOARD_STRING += keyboard_lastchar;
	
//if(WIDGET_CURRENT && is_instanceof(WIDGET_CURRENT, textInput))
//	WIDGET_CURRENT.onKey(KEYBOARD_PRESSED);