Thanks Michael.
I am using Adobe Acrobat files in a Delphi application.
I installed Acrobat Control for ActiveX and got a TPDF component in Delphi. When I drop a Tpdf componet on a form, I can use it to load a .pdf file, and the Acrobat Reader will be brought up automatically. The toolbar is Acrobat Reader's toolbar. On Acrobat Reader, we can selete the toolbar's buttons.(make them visiable or not visiable.) I want to disable some toolbar's buttons from Delphi. So when a .pdf file is loaded, some button (for example, the save button) is not showed on the PDF page.