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1. #Text clipboard online how to#
2. #Text clipboard online software#
3. #Text clipboard online series#
4. #Text clipboard online windows#

The data being pointed to must be data that can be displayed in bitmap format. Handle to a bitmap display format associated with an application-specific format.

#Text clipboard online software#

Handle to a Software Arts' Data Interchange Format (SADIF) buffer

#Text clipboard online windows#

Used in Windows 2000 only, this is also a handle to a BITMAPINFO structure where the subsequent bits represent the bitmap color information and the bitmap image. Handle to a BITMAPINFO structure followed by the bits that constitute the bitmap

#Text clipboard online how to#

Handle to a bitmap (you'll see how to use this format in this article series' second demo) Table 2 - Standard Clipboard Formats uFormat value We'll be getting into this format later on. Registered formats are user-defined formats that enable you to specify formats for application-specific data. The value you specify for the uFormat parameter must be either a standard Clipboard format (Table 2) or a registered format. HANDLE SetClipboardData(UINT uFormat, HANDLE hMem) Here's the very simple syntax for this function where the hMem parameter is the handle returned from the GlobalAlloc function. To unlock the global memory block, make a call to the GlobalUnlock API function. Once you've made the Clipboard mechanism aware of the new data (next step), Windows will now have control over that memory and any further tampering with it on your end might very well invalidate the integrity of the data. According to the Windows documentation, once you've allocated the memory and inserted the data to be made public to other processes, you are not to touch this memory again. This is a very important, yet often overlooked step in the process. How you do this will depend on what type of data you're transferring so I'll go into more detail about this step in the three demos that follow this article. Once you've allocated the global memory and have obtained a pointer to it, you can copy the desired data into that global memory buffer. This function is very straight-forward and takes as its only parameter a handle returned from the GlobalAlloc function. The second function that you need to call to allocate the memory for your data is the Windows API function, GlobalLock. The parameter dwBytes is a double word that enables you to specify how large a buffer you wish to allocate. Note - Since specifying a value of GMEM_FIXED for the uFlag parameter to the GlobalAlloc call will return a pointer while specifying GMEM_MOVEABLE will return a handle, these two values are mutually exclusive. This value combines GMEM_FIXED and GMEM_ZEROINT, the later simply initializing the allocated memory to all zeroes. Therefore, the return value when specifying GMEM_MOVEABLE is a handle to the memory. However, the can be moved within the default heap. In Windows, memory blocks are never moved in physical memory. The return value from GlobalAlloc when specifying GMEM_FIXED is a pointer. The default value, this allocated a block of fixed (i.e., non-moveable) memory. The valid values for this parameter are in the Table 1 and can be combined with the logical or operator. If you specify a value of 0 (or NULL), then a value of GMEM_FIXED is assumed. The uFlags parameter is used to specify to Windows how the memory is to be allocated. HGLOBAL GlobalAlloc(UINT uFlags, SIZE_T dwBytes) Figure 1 shows these steps in a standard UML Sequence Diagram with the subsequent sections going into more detail about each step. Another thing to realize at this point is that regardless of the type of data being transferred to the clipboard, the same basic programmatic steps are taken any time you are transferring data to or from the Clipboard. If you're familiar with the Windows API - especially the means by which memory is allocated via the GlobalAlloc and GlobalLock functions - the steps needed to use the Clipboard will be all the easier to learn.

#Text clipboard online series#

Since the Clipboard API is by far the most common method used, most of the demos in this little series will use this technique. The first involves using the Windows Clipboard API and the second uses OLE. There are actually two distinct mechanisms for interfacing to the Clipboard. After I've gone over the basics steps, which are used no matter what data format is on the Clipboard, I'll present a demo application that illustrates how to programmatically transfer simple (ANSI) text to and from the Clipboard. In this first instalment of a four-part series of articles on programmatically transferring data to and from the Windows Clipboard, I'll explain the basic steps of using the Clipboard using the Clipboard API. With just a few lines of code, you can easily add Clipboard functionality to your application.