WM_IME_SETCONTEXT
Funcional Difference from WIN95
The ISC_SHOWGUIDWINDOW is documentation error of Win95, It is ISC_SHOWGUIDELINE.
The ISC_SHOWUISOFTKBD is not supported.
Functional Difference from SBCS Open32
'N/A'
Implementation
This message is translate to the WM_IMEREQUEST/IMR_INSTANCEACTIVATE of OS/2.
Behavior using 16 bit IME
You can use this message as same as a 32bit IME.