WM_IME_STARTCOMPOSITION
Funcional Difference from WIN95
The WM_KEYDOWN before this message is not supported.
Functional Difference from SBCS Open32
'N/A'
Implementation
This message is created from WM_IMENOTIFY/IMN_STARTCONVERSION of OS/2.
Behavior using 16 bit IME
You can use this message as same as 32bit IME.