Prevent Document Close by Close(X)

Hi,

     Im Developing a Indeisgn SDK to control the Indesign QuitInDesign option & Close(X) Option.

I need to control the document close by the cloe(X) option of the document.I have already disabled the indesign file->close option.

Now,I need to control the close(x)option of the document which is present in the top right corner of the document.

Whenever i click the close(x)option of the document the document must be saved & den closed.The same way when i select InDesign

QuitInDesign option,the document must be saved & den the Indesign quit action to be performed.Tell me how to develop a Indesign

SDK for my requirement.