This is similar to you manually using the command, except that when you COPYCLIP or COPYBASE, you do not provide a file name or location, and in the case of COPYCLIP, you do not provide a base point either. Instead, when you cut or copy AutoCAD objects to the clipboard (using or, not the internal COPY command), what AutoCAD actually does it write those entities out to a.DWG file in your%temp% folder. But for the purpose of moving AutoCAD data around, the traditional Windows clipboard is not used. Of course there are add-on programs available that expand the clipboard and allow multiple copies to be retained.Ever since AutoCAD became a MDI application, it has supported cut, copy, and paste commands.
When you perform the next cut/copy action, the new data is stored in memory and the previous data is removed. Generally speaking, when you copy (or cut) objects in Windows applications, to paste into the same or different application, Windows stores the data in a defined format and holds on to it until you replace it with a new cut/copy action. The actual clipboard data also includes a bitmap other miscellaneous data, but when you paste this into AutoCAD, only the AutoCAD entities are inserted.So why do you need to know this? A new copy overwrite the last one – except that sometimes it does not.When you copy AutoCAD geometry to the clipboard, not only is the data written out to a DWG file, but a piece of data is also added to the Windows clipboard so that when you go to paste this data, AutoCAD will know which DWG file to grab and insert for you. Like traditional Windows clipboard commands, only the last set of data copied is available for pasting.
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