Per IME Interfaces Characteristics

  • Article

This topic describes the characteristics of the Per IME interfaces for Microsoft IME versions for Japanese, Simplified Chinese and Traditional Chinese.

The characteristics of the Per IME interfaces are:

  • Can be used only when an IME is active.

  • Can handle per context requests.

  • Uses the Windows messaging architecture. The application calls SendMessage() to send a message to the UI window of IME. The UI window must be sub-classed in order to receive private window messages.

  • The message ID is obtained by RegisterWindowMessageA() (notice the A, not W) Windows API.

  • Each feature/interface has a message ID and one or more function IDs.

  • The application and/or IME must handle compatibility of functions across different versions.

The WM_MSIME_xxx Messages are implemented in this format to be used in synchrony with existing, standard IMM messages.