How to prevent inputting Russian characters in Word with a Word addin?

Question

Hi,

Sorry for this vaguely described problem, but please look at the problem from the Win32 API's perspective.

I'm writing a Word addin using Addin Express with Delphi, and I use some other 3rd party VCL's also, including virtual stringtree, TNT controls, etc. Now I cannot input Russian characters in Word anymore, but I can input English and Chinese....

Since it's a large project I don't know where to start finding the problem, would you give me some generic tips, I'll be appreciated that!

Update 1: I found the culprit, it's because the problem use TntActnList.pas from the well-known TNT Controls package, haven't found a solution to solve it though!

Thank you, and have a nice day!