Using a Window
Class CWindow allows you to use a window. Once you attach a window to a CWindow
object, you can then call CWindow
methods to manipulate the window. CWindow
also contains an HWND operator to convert a CWindow
object to an HWND. Thus you can pass a CWindow
object to any function that requires a handle to a window. You can easily mix CWindow
method calls and Win32 function calls, without creating any temporary objects.
Because CWindow
has only two data member (a window handle and the default dimensions), it does not impose an overhead on your code. In addition, many of the CWindow
methods simply wrap corresponding Win32 API functions. By using CWindow
, the HWND member is automatically passed to the Win32 function.
In addition to using CWindow
directly, you can also derive from it to add data or code to your class. ATL itself derives three classes from CWindow
: CWindowImpl, CDialogImpl, and CContainedWindowT.
See also
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