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DEVICE CONTEXT
The device context provides the essential drawing tools and the platform to draw. It helps to draw the text, shapes, lines etc. To create the device context, the MFC provides different classes like CDC and CClientDC.
The CDC is the most primary class to draw in MFC. It provides all of the fundamental drawing steps.
The CClientDC class is used for drawing in the client region of a window.
The Device context is a windows data structure which supports the device independent output.
The function of device context is best elaborated by the figure.
Figure: The Role of Device Context
The logical display is a virtual device and Actual display is the physical device. The programmers do not require worrying about the medium in which he is writing the output. The device context takes care of the output medium.
steps of connecting database from vb6.0
VISUAL INTERFACE DESIGN Instead of the graphic nature of the program, only the visualness of the inter action is important. The program must not focus on the GUI. On the other
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Displaying The Database: The Text box, image box, check box, labels, picture box can be bounded to the data control for exhibiting the data base contents. The two properties a
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THE MFC CLASSES The CDocument, CWinAppCFrameWnd and CView are derived from the CObject and they give the majority of the structure and functionality.
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Write an event procedure to automate the billing system of a supermarket. Give the details of database tables, forms, controls and menu design (if any). Make assumptions, wherever
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