Page 22 - DCAP408_WEB_PROGRAMMING

Windows Programming

Notes Using Resource Files

To load a resource file, you can call the GetResourceStream method of the Application class,
passing a pack URI that identifies the desired resource file.GetResourceStream returns a
StreamResourceInfo object, which exposes the resource file as a Stream and describes its content
type.
As an example, the following code shows how to use GetResourceStream to load a Page resource
file and set it as the content of a Frame (pageFrame):

While calling GetResourceStream gives you access to the Stream, you need to perform the
additional work of converting it to the type of the property that you'll be setting it with. Instead,
you can let WPF take care of opening and converting the Stream by loading a resource file
directly into the property of a type using code.

Self Assessment

Fill in the blanks:
12. ........................ are defined as the data that you can include to the applications executable
file.

13. The simplest manner to recover a resource from code is to call either the ........................ or
the TryFindResource method from framework-level objects in your application.

1.8 Program Instances

A window is considered as parent when it can be used to host, hold, or take other windows. For
instance, when the computer begins, it draws its main screen, also known as the desktop, which
covers the widest area that the monitor screen can propose. This primary window turns out to be
the host of all other window that will exhibit as long as the computer is own. This desktop is also
a complete window in its own right. As declared already, to get its handle, you can call the
GetDesktopWindow() function.
After the desktop has been generated, a window of yours can display if the user begins your
application. This signifies that an application must have been generated for the user to use it.
When the user opens an application, we also say that the application has been instantiated or an
instance of the application has been generated. Depending on this, any time you generate an
application, you must offer an instance of it. This permits the operating system to handle your
application with respect to its communication with the user and also its relationship with other
resources. Thus, you must always generate an instance for your application. This is taken care of
by the first argument of the WinMain() function.

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