How do I know if all the text written in the layer is visible?

Helloguys,

I usetheSDKtomake apluginautomationthatreplacestextin alayerwith anothertext.
I wonder ifallthe textbeing replaced isvisibleorifthetextboxistoosmall.

In Photoshop.exe, i have the information, with the little cross under the text (like images).

Can you help me? How find this information in SDK?

Thanks a lot,

Celine.