A couple of questions (and comments) to clarify:
1.) What is the scope of the dataset (was it created PUBLIC at the module level)? If so then you can reference it from any portion of your application. If it was created at the form level then it (under most instances won't readily be available).
2.) Are you refering to a DataGridView as the control to view your dataset with? If so, any instance of a DataGridView on all forms should be able to reference a publicly created dataset.
Best Regards,
Earl Francis