Ollie Kett Designs :: Website & iPhone Development :: Mouse Drag C%23

17 October 2008, 11:17 PM

When creating custom design in C# you want to move your application these codes will enable the whole application or just the outsides to move.

using Microsoft.Win32;
using System.Runtime.InteropServices;

On Form1 add this code

public Form1()
        {
            InitializeComponent();
        }
            public const int WM_NCLBUTTONDOWN = 0xA1;
            public const int HT_CAPTION = 0x2;

            [DllImportAttribute("user32.dll")]
            public static extern int SendMessage(IntPtr hWnd,
                int Msg, int wParam, int lParam);

[DllImportAttribute("user32.dll")]
public static extern bool ReleaseCapture();

       private void Form1_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                ReleaseCapture();
                SendMessage(Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0);
            }
        }

Or if you wish to apply it to move by an object only add

private void Object_MouseDown(object sender, MouseEventArgs e)
      {
            if (e.Button == MouseButtons.Left)
            {
                ReleaseCapture();
                SendMessage(Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0);
            }
        }