2 files changed, 12 insertions, 1 deletions
diff --git a/components/rtgui/include/rtgui/widgets/button.h b/components/rtgui/include/rtgui/widgets/button.h
index c414b17961..b81c88281e 100644
--- a/components/rtgui/include/rtgui/widgets/button.h
+++ b/components/rtgui/include/rtgui/widgets/button.h
@@ -68,6 +68,17 @@ extern "C" {
     void rtgui_button_set_pressed_image(rtgui_button_t *btn, rtgui_image_t *image);
     void rtgui_button_set_unpressed_image(rtgui_button_t *btn, rtgui_image_t *image);
 
+    /** Set the callback function on button btn
+     *
+     * If the btn is a push button, the callback will be invoked every
+     * time the btn got "pushed", i.e., both pressed down @em and pressed
+     * up.  If the button is a normal button, the callback will be invoked when
+     * the btn got "clicked", i.e., when pressed up @em after pressed
+     * down.
+     *
+     * @param btn the btn that the callback will be setted on.
+     * @param func the callback function.
+     */
     void rtgui_button_set_onbutton(rtgui_button_t *btn, rtgui_onbutton_func_t func);
 
     rt_bool_t rtgui_button_event_handler(struct rtgui_object *object, struct rtgui_event *event);
diff --git a/components/rtgui/include/rtgui/widgets/textbox.h b/components/rtgui/include/rtgui/widgets/textbox.h
index 918e98d162..e6c1d008ab 100644
--- a/components/rtgui/include/rtgui/widgets/textbox.h
+++ b/components/rtgui/include/rtgui/widgets/textbox.h
@@ -76,7 +76,7 @@ rt_bool_t rtgui_textbox_event_handler(struct rtgui_object *object, struct rtgui_
 void rtgui_textbox_set_value(struct rtgui_textbox *box, const char *text);
 const char *rtgui_textbox_get_value(struct rtgui_textbox *box);
 void rtgui_textbox_set_mask_char(rtgui_textbox_t *box, const char ch);
-const char rtgui_textbox_get_mask_char(rtgui_textbox_t *box);
+char rtgui_textbox_get_mask_char(rtgui_textbox_t *box);
 void rtgui_textbox_set_line_length(struct rtgui_textbox *box, rt_size_t length);
 
 void rtgui_textbox_get_edit_rect(struct rtgui_textbox *box, rtgui_rect_t *rect);