How to Capture exact Application folder name where change is detected by Teamcity

Hi,

I am new to TeamCity so please bear with me if question is absolutely basic.

I would like to know how i can capture name of application folder where development change was detected by Teamcity so that i can use that application name to proceed with further build.

Set up which i have is:

1) Team City detects code change in GIT repository ,  let say application name changed is , bw-accsrv-esb.

2) Moment detection is done , Ant script is called in background which will take application name as input and then using this input it proceeds with build script.

As of now i am hard coding application name in a file from where value is sent to ant script as said in point 2 above.

But here i want that application name should get captured by team city when developer makes change on that given application.So that dynamically i can use that application name and call ant build script with captured application name.

Example: If developer makes change in application , bw-accsrv-esb , then somehow i want this name to be captured so that i can pass this name as input in ant build script

I would be thankful if you can guide me how i achieve this.

Thanks

Shrijeet Sinha