How does my plugin appear under the WYSIWYG Editor in "Create new article"-Screen

I have written a Wordpress Plugin and now I want, that the Plugin appears (HTML Form) in the "开发者_如何学运维Create New Article"-Screen unter the WYSIWYG Editor (after installation and activation). How can this be done. In the Codex and other sources I haven't found anything related to that problem.

BR & Thanks in advance, mybecks

Are you aware of this feature in wordpress add_meta_box()

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