![]() ![]() In the list above, that includes formats like "XML Spreadsheet", "Csv", and "Biff8". However, to handle the case where one of the Windows default formats will not work, Windows also allows applicatons to register additional formats and give them useful names. By default, Windows knows about a few predefined types of clipboard data: these are identified by constants in the header file and are things like CF TEXT (text data) and CFDIB (a device indepentant bitmap). Following the ID is the clipboard format's name, of which there are two kinds. This is the ID used by Windows to identify the format used by a particular chunk of data. The leftmost column is the integer ID of the clipboard format. To show what it looks like, here's sample output after copying a small Excel table to the clipboard: c009: "DataObject" (4 bytes)Ĭ003: "OwnerLink" ERROR in GetClipboardDataĬ00f: "Link Source Descriptor" (152 bytes) It can also dump out the data in hexadecimal format, so you can see the actual data, unaltered by applications. This tool, cbdump, runs from the command line and shows a list of all the data formats currently on the clipboard. In the process of adding better clipboard support to vCalc, I wrote a small tool for dumping clipboard contents to a console window. This is how different applications negotiate data formats when copying and pasting data this is why you can copy a spreadsheet from super-smart Excel, paste it into super-dumb Notepad, and still get reasonable results. One way to see this is to open the Clipbook viewer application (start>run, clipbrd.exe), open the Clipboard window, and look at the list of data formats in the view sub menu. For example, if you copy text in Microsoft Word to the clipboard, it's not copied in one format, it's copied in seventeen. One of the more interesting aspects of the way the clipboard works is that it allows applications to copy data to the clipboard in multiple formats. It's been around since Windows 1.0 and basically all applications use it to support operations like copy, cut, and paste. The clipboard is one of the oldest and most often used data exchange mechanisms in Microsoft Windows. ![]()
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