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Dragging a Borderless Form

, 13 Jul 2010
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A slightly different solution.using System.Runtime.InteropServices;private const int WM_NCLBUTTONDOWN = 0xA1;private const int HTCAPTION = 0x2;[DllImport("User32.dll")]private static extern bool ReleaseCapture();[DllImport("User32.dll")]private static extern int...
A slightly different solution.
using System.Runtime.InteropServices;
private const int WM_NCLBUTTONDOWN = 0xA1;
private const int HTCAPTION = 0x2;
private static extern bool ReleaseCapture();
private static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);
public Form()
private void AssignHandler(Control control)
    if (control is Form
        || control is Label
        || control is Panel
        || control is PictureBox
        || control is TableLayoutPanel)
        control.MouseDown += Form_MouseDown;
    foreach (Control subControl in control.Controls)
private void Form_MouseDown(object sender, MouseEventArgs e)
    if (e.Button == MouseButtons.Left)
        SendMessage(Handle, WM_NCLBUTTONDOWN, HTCAPTION, 0);


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

Dima Popov
Software Developer Energoservice
Russian Federation Russian Federation
Dmitry lives in Arkhangelsk, Russia. He has developed C# applications since 2007.

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