Introduction - If you have any usage issues, please Google them yourself
Depending on the application of the actual needs of MFC dialog-based programming model, the client area of the dialog box interface is divided into two parts, one is used to display the coordinates of the image region and the other is part of the operation and user interaction, According to the different needs of users operating options and settings. Dialog-based programming, for the drawing part of the curve, the establishment of axes and scale, the origin and so on, according to their own preferences settings. The design curve is not very high precision of drawing, sampling only a finite number of points, but also to establish their own coordinate system, there are some values of the trade-offs. Allan variance can draw the approximate direction.