Jonathan Yong

When your winform is a custom shape form and doesn't have the title bar, you might want to allow the user to move the form by clicking on the client area.

Here is a code snippet of how to do it :

public class Form1 : System.Windows.Forms.Form
{
    private Point offset;
   
    private void Form1_MouseDown(object sender,
        System.Windows.Forms.MouseEventArgs e)
    {
        Point loc = this.Location;
        Point mp = Control.MousePosition;
       
        offset = new Point(-(mp.X - loc.X), -(mp.Y - loc.Y));
    }
   
    private void Form1_MouseMove(object sender,
        System.Windows.Forms.MouseEventArgs e)
    {
        if(e.Button == MouseButtons.Left)
        {
            Point mousePos = Control.MousePosition;
            mousePos.Offset(offset.X, offset.Y);
            Location = mousePos;
        }       
    }
}

Other winform code details has been omitted for code clarity here.

Labels: programming