Visual C++ and MFC Programming 2nd Edition

Visual C++ and MFC Fundamentals Chapter 12: Dialog-Based Windows

For a Win32 application, the original distance from the left border of the monitor is

passed as the x argument to the CreateWindow() or the CreateWindowEx() function.

The distance from top is specified using the y argument. The x and y arguments define

the location of the window. The distance from the left border of the monitor to the right

border of the window is specified as the nWidth argument. The distance from the top

border of the monitor to the lower border of the window is specified with the nHeight

value.

If you cannot make up your mind for these four values, you can use the

CW_USEDEFAULT (when-Creating-the-Window-USE-the-DEFAULT-value) constant

for either one or all four arguments. In such a case, the compiler would select a value for

the argument.

For an MFC application, when calling the CFrameWnd::Create() method, the location

and size of the frame window is specified as a RECT or CRect rectangle as we saw in

Lesson 2. As done with the CW_USEDEFAULT constant, you can let the compiler

decide on the rectangle by passing the rect argument as rectDefault. Here is an example:

CMainFrame::CMainFrame()

{

// Declare a window class variable

WNDCLASS WndCls;

const char *StrWndName = "Windows Fundamentals";

...

const char *StrClass = AfxRegisterWndClass(WndCls.style, WndCls.hCursor,