SetTreeColumn not working

Hello ,

I have a report control in my project which has some rows / records with child rows / records . If any parent row has childs , then a plus / minus sign is displayed on the parent row . we can expand / collapse child rows clicking that plus / minus sign .

Everything is working fine if my computer regional settings are set to English / United States . But if I change my regional and language options ( in contol panel ) to any other language other than english, then plus / minus sign is not getting displayed on the parent row , Although child rows are getting displayed and I can still collapse / expand child rows using arrow keys on keyboard . But Plus / Minus sign is missing .


Does anyone has any info on what is causing this and how to fix this issue ?

Note : I am using the SetTreeColumn function to create the Tree Structure.

Thank you