I want to create an application is visual studio which hides all numbers entered in any application

private void reportMoveToolStripMenuItem_Click()
       {
           // This is an event handler triggered by a menu item (or button).
           _reporterWin.BackColor = Color.Black;
           _reporterWin.Height = 20;
           _reporterWin.FormBorderStyle = FormBorderStyle.None;
           _reporterWin.TopMost = true;

           PositionReporterEdge(); // Position the window.
           _reporterWin.Show();
       }

       /// <summary>
       /// Position the "Reporter" form next to the current form.
       ///////////
       private void PositionReporterEdge()
       {
           int screenHeight = Screen.PrimaryScreen.WorkingArea.Height;
           int screenWidth = Screen.PrimaryScreen.WorkingArea.Width;

           Point parentPoint = this.Location;

           int parentHeight = this.Height;
           int parentWidth = this.Width;

           int childHeight = _reporterWin.Height;
           int childWidth = _reporterWin.Width;

           int resultX;
           int resultY;

           if ((parentPoint.Y + parentHeight + childHeight) > screenHeight)
           {
               // If we would move off the screen, position near the top.
               resultY = parentPoint.Y + 50; // move down 50
               resultX = parentPoint.X;
           }
           else
           {
               // Position on the edge.
               resultY = parentPoint.Y + parentHeight;
               resultX = parentPoint.X;
           }

           // set our child form to the new position
           _reporterWin.Location = new Point(resultX, resultY);
       }