1. Status Bar Aux Window
  1.1 Easy setting up buttons:
      a) Buttons and their images, orders.
      b) Buttons and their status
      c) Buttons and their Events or Actions

  1.2 Menus
      a) easy to define menu - submenu
      b) menu item and their items

  1.3 Style: user define or predefined good look and feel.

2. Preedit Area 
  2.1 Following the cursor position of (im client).
  2.2 Preedit Area Data transfer:
	1. nChar
        2. Cursor Char Index. [0-nChar]
        3. char* to UTF-8 char buf. (nChar, zero terminated)
        4. void* to decoration[nChar+1]
  2.3 Preedit Area window could stick with Status window.
        +---------------------+--------------+
        |  Preedit            |  Status      |
        +---------------------+--------------+
  2.4 Preedit Window style:
        1. font, color, background image, etc.

3. Candidate Area
   3.1 Could following the cursor position of the preedit area or sticky with the Preedit Area:
        following cursor:    +-----------------------------------+
                             |        !                          |
                             +-----------------------------------+
                                      +-------------------------------------+
                                      |   Candidates                        | (Candidates area could be vertical)
                                      +-------------------------------------+
        sticky               +-----------------------+---------+
                             | Preedit               | Status  |  (Status area is optional)
                             +-----------------------+---------+
                             | Candidates                      |
                             +---------------------------------+
   3.2 Candidate data API.
        1. nCandidate
        2. pointer to nCandidate of :
              a). nChar
              b). char * to UTF8 string
              c). void * to decoration array.

   3.3 Candidate window style
        font, color, background image, etc.

4. CLE option for IME to tell it using new Aux windows
        How could it works ?  Need Ervin to design it out.