Move a Form in code : Form « GUI Windows Forms « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. GUI Windows Forms
3. Form

using System;
using System.Drawing;
using System.Windows.Forms;

public class FormMoveDemo : Form
{
    private bool dragging;

    private Point pointClicked;

    public FormMoveDemo()
    {
        InitializeComponent();
    }

    private void lblDrag_MouseDown(object sender, MouseEventArgs e)
    {
        if (e.Button == MouseButtons.Left)
        {
            dragging = true;
            pointClicked = new Point(e.X, e.Y);
        }
        else
        {
            dragging = false;
        }
    }

    private void lblDrag_MouseMove(object sender, MouseEventArgs e)
    {
        if (dragging){
            Point pointMoveTo;
            pointMoveTo = this.PointToScreen(new Point(e.X, e.Y));

            pointMoveTo.Offset(-pointClicked.X, -pointClicked.Y);

            this.Location = pointMoveTo;
        }   
    }

    private void lblDrag_MouseUp(object sender, MouseEventArgs e)
    {
        dragging = false;
    }

    private void cmdClose_Click(object sender, EventArgs e)
    {
        this.Close();
    }

    [STAThread]
    public static void Main(string[] args)
    {
        Application.Run(new FormMoveDemo());
    }
    private System.Windows.Forms.Button cmdClose= new System.Windows.Forms.Button();
    private System.Windows.Forms.Label lblDrag = new System.Windows.Forms.Label();

    private System.ComponentModel.IContainer components = null;

    private void InitializeComponent()
    {
        this.SuspendLayout();
        // 
        // cmdClose
        // 
        this.cmdClose.Location = new System.Drawing.Point(102, 215);
        this.cmdClose.Name = "cmdClose";
        this.cmdClose.Size = new System.Drawing.Size(76, 20);
        this.cmdClose.TabIndex = 5;
        this.cmdClose.Text = "Close";
        this.cmdClose.Click += new System.EventHandler(this.cmdClose_Click);
        // 
        // lblDrag
        // 
        this.lblDrag.BackColor = System.Drawing.Color.Navy;
        this.lblDrag.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
        this.lblDrag.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
        this.lblDrag.ForeColor = System.Drawing.Color.White;
        this.lblDrag.Location = new System.Drawing.Point(94, 167);
        this.lblDrag.Name = "lblDrag";
        this.lblDrag.Size = new System.Drawing.Size(96, 36);
        this.lblDrag.TabIndex = 4;
        this.lblDrag.Text = "Click here to move the form!";
        this.lblDrag.MouseUp += new System.Windows.Forms.MouseEventHandler(this.lblDrag_MouseUp);
        this.lblDrag.MouseMove += new System.Windows.Forms.MouseEventHandler(this.lblDrag_MouseMove);
        this.lblDrag.MouseDown += new System.Windows.Forms.MouseEventHandler(this.lblDrag_MouseDown);
        // 
        // FormMoveDemo
        // 
        this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
        this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
        this.ClientSize = new System.Drawing.Size(292, 266);
        this.ControlBox = false;
        this.Controls.Add(this.cmdClose);
        this.Controls.Add(this.lblDrag);
        this.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
        this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
        this.MaximizeBox = false;
        this.MinimizeBox = false;
        this.ResumeLayout(false);
    }
   
}

23.2.Form
	23.2.1.	Subclass Form
	23.2.2.	Use Inherited form in a separate Main class
	23.2.3.	Inherit Form With Constructor
	23.2.4.	ResumeLayout and SuspendLayout
	23.2.5.	Call form constructor to create a Form object
	23.2.6.	Cal Show method to display a form
	23.2.7.	Text as the title
	23.2.8.	Set Form Visible properties
	23.2.9.	The difference between Form.Show and Application.Run()
	23.2.10.	The Hello, WindowsForms Application
	23.2.11.	Build Form without by hand
	23.2.12.	Inherited Form
	23.2.13.	Move a Form in code
	23.2.14.	Irregular form
	23.2.15.	Add a Main Menu
	23.2.16.	Change Form size in menu action
	23.2.17.	Scroll Form
	23.2.18.	Form message filter
	23.2.19.	Form Dispose
	23.2.20.	Change Form Cursor
	23.2.21.	Add control to Form dynamically