C # simulates mouse writing

Often see others take a boxy writing pad with a pen, in C # can actually be achieved, the general idea is to deal with the mouse coordinates and graphics,

The code is as follows:

Declare two global variables first

BOOL Ismousedown = false;        Point point = new Point ();

Re-overriding the MouseDown event:

protected override void OnMouseDown (MouseEventArgs e)        {point            = e.location;//Current coordinates            Ismousedown = true;// Indicates that the mouse has been pressed        }

Because when you write, you need to move around, you also rewrite the move event:

protected override void OnMouseMove (MouseEventArgs e)        {            if (Ismousedown)            {                using (Graphics G = this. CreateGraphics ())                {                    g.smoothingmode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;                    using (Pen pen=new pen (color.black,3f))//Brush                    {                        g.drawline (pen, point, e.location);//start drawing line point                        = e. location;//Update Coordinates}}}}        

As a final step, rewrite the MouseUp event to:

protected override void OnMouseUp (MouseEventArgs e)        {            Ismousedown = false;        }

As follows: initial interface

Interface for writing

C # simulates mouse writing