awtk/demos/assets/default/raw/styles/dialog.xml

<button bg_image_draw_type="patch3_x" text_color="blue">
  <style name="green_btn" >
    <normal   bg_image="green_btn_n" />
    <pressed  bg_image="green_btn_p" />
    <over     bg_image="green_btn_o" />
  </style>

  <style name="red_btn">
    <normal   bg_image="red_btn_n" />
    <pressed  bg_image="red_btn_p" />
    <over     bg_image="red_btn_o" />
  </style>
</button>

<dialog>
  <style name="custom">
    <normal />
  </style>
</dialog>

<dialog_title icon="info" text_color="black">
  <style name="custom">
    <normal bg_image="dialog_title"  bg_image_draw_type="patch3_x"/>
  </style>
</dialog_title>

<dialog_client>
  <style name="custom">
    <normal bg_color="#ededed" border_color="gray" />
  </style>
</dialog_client>