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al_append_native_text_log - Allegro 5 API
#include <allegro5/allegro_native_dialog.h> void al_append_native_text_log(ALLEGRO_TEXTLOG *textlog, char const *format, ...)
Appends a line of text to the message log window and scrolls to the bottom (if the line would not be visible otherwise). This works like printf. A line is continued until you add a newline character. If the window is NULL then this function will fall back to calling printf. This makes it convenient to support logging to a window or a terminal.