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WS_OVERLAPPEDWINDOW(WS_OVERLAPPED | \)
WS_CAPTION | \
WS_SYSMENU | \
WS_THICKFRAME | \
WS_MINIBOX | \
WS_MAXIMIZEBOX | \)
The "Window Caption" is the text that will appear in the titlebar of window
		Display the window
After the create window call returns,the window has been created internally in the window,however the window does not yet appear on the video display Two more calls are needed The first is
SHOW WINDOW(hwnd,iCmdShow) ;
first argument handle to window just created by window .the Second argument is the iCmdShow value passed as a parameter  to WinMain.Which
help as to know whether the screen is normal,minimized or maximized.
UPDATEWINDOW(hwnd);
the causes the client area to be painted It accomplish this by sending the window procedure is the Wndproc functions in HELLOWIN.C) a WM_PAINT message