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The TextBox class is based on the TextBoxBase class, which provides much of the core functionality for text controls An overview of this base class appears in NET Table 92..

strchr( ), strncmp( ), memcpy( ), strncat( )

In this last chapter of the book, it seems appropriate to mention a number of different topics worthy of further exploration. This chapter presents various concepts that might be of interest to you as you build and deploy Windows Forms applications. Since the details of each topic could easily fill all or most of a chapter, we will instead show a rather quick example for each subject. These examples should point you in the right direction as you expand your knowledge of .NET in general and Windows Forms in particular. We will take a quick look at four different topics: Printing, including page setup and print preview. Windows Forms Timers, including stopping and restarting a timer. Drag and drop, both into and out of Windows Forms applications. Hosting ActiveX controls, by way of hosting a web browser control. For no particular reason, these topics are presented in the same order as they are listed. We begin with printing from Windows Forms applications. 603

char *strnset(char *str, int ch, size_t count)

G-38

The prototype for strnset( ) is found in <stringh> The strnset( ) function sets the first count characters in the string pointed to by str to the value of ch It returns str

Printing in Windows Forms is supported by the System.Drawing.Printing namespace in addition to Windows Forms constructs. In this section we add printing support to the MyPhotos MDI application built in chapter 16. The main classes required are as follows:

This fragment sets the first 10 characters of str to the value x:

Printing related classes Class PrintDocument Description A reusable component that is used to send output to the printer. The PrintPage event occurs when print data should be sent to the printer device. A common dialog that offers options related to printing. A form that contains a PrintPreviewControl object for presenting how a document will look when it is printed on a specific printer device. A common dialog that permits a user to alter the page settings associated with a print document.

strnset(str, 'x', 10);

.

strset( )

Our example will use each of these four classes in order to support printing of an individual photograph. Figure 18.1 shows the print preview dialog for one of our images.

char *strpbrk(const char *str1, const char *str2)

Figure 18.1 Note how the text here is drawn to the right of the image. Long strings, such as the Notes text, are formatted to fit within the available page margins