Beginner small white Fit, about C # irregular form of moving the wording

public partial class Frmmain:form
{
Point old;//creates a new point object to record the form's original coordinates
Public Frmmain ()
{
InitializeComponent ();
}

Mouse click events

private void Frmmain_mousedown (object sender, MouseEventArgs e)
{
Old = new Point (-e.x,-e.y);//Record the original position of the form
}

Move events for Mouse

private void Frmmain_mousemove (object sender, MouseEventArgs e)//parameter E is the event parameter for the mouse
{

Determines whether the mouse is pressed to the left button
if (E.button = = mousebuttons.left)//e as parameter
{
Record the current position of the mouse
Point newp = mouseposition;
Newp.offset (old);//panning
This. Location = newp;//Change the position of the current form
}
}

Beginner small white Fit, about C # irregular form of moving the wording