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CreateWindowEx and draw area

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Hi, I'm trying to create a window with a custom specified draw area, but the function CreateWindowEx only allows to specify the width and height of the entire window, including title bar and borders. So this instuction:
	// create a window
	if (!(hwnd = CreateWindowEx(0,               // extended style
			     WIN_CLASS_NAME,                 // class identifier
				 "Learning Windows GDI",         // window title
				                                 // parameters
				 CW_USEDEFAULT, CW_USEDEFAULT,   // initial position
				 nWidth, nHeight,                // initial size
				 NULL,                           // handle to parent (desktop)
				 NULL,                           // handle to menu (none)
				 hinstance,                      // app handle
				 NULL)))                         // extra parameters
gives me a window which is nWidthxnHeight including titlebar and borders. Does anyone know an easy and clean way to actually get a custom specified drawing area? Thanks in advance!

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You could use AdjustWindowRect() to calculate a window size that accommodates a given client size.

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