How to find ITextVariableTable?

Hi,

I want to find ITextVariableTable for finding variable text in indesign.

I have IStringData and IScript, but not able to find the above interface.

I find that 'QueryTextVariableTableFromScript' function of ITextScriptUtils will give 'ITextVariableTable' but it also require 'RequestContext' as parameter and I am unable to get it.

Is there any other way to find variable text?

Please help me.

Thanks,

Aman