Having never used (or seen) this module before, I would take the advice of the module author in the docs at This Point and use Data::Dumper to find out what I have. If nothing else, it should provide you with a starting point for answering your questions.

Hope that is of some help....

Update: Incidentally, your post, as mentioned by Anonymous would be a lot easier to read/understand if it looked something like:

Dear All,

I have a question regarding the Convert::Binary::C module.

1. I parse a header file having MyStruct. A array is declared of type MyStruct MyObjects3. The statement if ($c->def("MyStruct")) returns TRUE whereas if ($c->def("MyObjects")) does not return TRUE,

   why ?. What is the way out ?.

2. sizeof(Strcture Name) works fine, but sizeof(Object Name) does not work.

   Why ?. WHat is the way out ?.

3. Is there any way to know the size of the variable(Myobject) and what about arrays ?.

   How do i get the size of an array ?.

Regards, Giri.