Using softkeypad input Chinese character problem

I am a user of QNX RTOS 4.24 in China ,using the CPIM Chinese input
method.In recent,meet a problem,describe below:
I had constructed soft keyboard same as (keypad.tar) download from qnx CPIM.selected a Chinese input method to input Chinese
character,when mouse click on soft keyboard,the input area simultaneous
receive English character and Chinese character.I want only Chinese
character,not both.
How can I do?

FengJing Zhang