Citrix verification function to capture text on screen

Hi folks,

I'm using Citrix/ICA single protocol script to capture a Citrix business flow. As part of the flow, there is a unique number generated which i would like to capture in the script. I understand that we have a function named ctrx_get_text function that could be used to capture text - however per HP's Function Reference "ctrx_get_text function is available only if the LoadRunner agent is installed on the Citrix server" 

I do not have an Agent installed on the Citrix server so is there any otherfunction that could be used to capture this unique piece of text from the screen? Please let me know. 

Appreciate any help.

Thanks,

Kunal