[lordelf2004]

I set my form start at Point(0,0) in screen, and I don't want users can move it into another point when they run it . Which properties should I use?
Thanks in advance.

[nofear217]

do you need the form to have a border or title bar?

[gbertoli3]

Go to your Form's Locationchanged() Event and type:

this.Location = this.Location;

Hope this helps

[lordelf2004]

gbertoli3, on 12 Nov, 2008 - 06:38 PM, said:

Go to your Form's Locationchanged() Event and type:

this.Location = this.Location;

Hope this helps

I tried it, but it didn't work. I also need border and title bar in my form.

[gbertoli3]

Well for the Title Bar I suggest you read gabehabe's tutorial.

You could also try putting that code in the MouseDown() Event, that way whenever the mouse is down(includes moving) it will not move.

Hope this helps

[lordelf2004]

gbertoli3, on 12 Nov, 2008 - 09:54 PM, said:

Well for the Title Bar I suggest you read gabehabe's tutorial.

You could also try putting that code in the MouseDown() Event, that way whenever the mouse is down(includes moving) it will not move.

Hope this helps

Thanks gbertoli3,

I found this class in Google, it solved my problem.

	/// <summary>
	/// Prevents a form being moved.
	/// </summary>
	public sealed class unmovableForm : NativeWindow
	{
		/// <summary>
		/// Represents all the positional characteristics of a window.
		/// </summary>
		private struct WindowPos
		{
			public int hwnd;
			public int hWndInsertAfter;
			public int x;
			public int y;
			public int cx;
			public int cy;
			public int flags;
		}

		private const int WM_WINDOWPOSCHANGING = 0x46;

		/// <summary>
		/// The form to be immobilised.
		/// </summary>
		private Form target;

		public unmovableForm(Form target)
		{
			this.target = target;
			this.target.HandleCreated += new EventHandler(target_HandleCreated);
			this.target.HandleDestroyed += new EventHandler(target_HandleDestroyed);
		}

		void target_HandleCreated(object sender, EventArgs e)
		{
			// Listent to the target forms message queue.
			AssignHandle(this.target.Handle);
		}

		void target_HandleDestroyed(object sender, EventArgs e)
		{
			ReleaseHandle();
		}

		protected override void WndProc(ref Message m)
		{
			if (m.Msg == WM_WINDOWPOSCHANGING)
			{
				WindowPos pos = (WindowPos)Marshal.PtrToStructure(m.LParam, typeof(WindowPos));

				// Reset the new location to the same as the current location.
				pos.x = this.target.Left;
				pos.y = this.target.Top;

				Marshal.StructureToPtr(pos, m.LParam, true);
			}

			base.WndProc(ref m);
		}
	}

add this code in constructor's form, it worked.

			unmovableForm unmovableform;			
			//Prevent the form being moved.
			unmovableform = new unmovableForm(this);

[gbertoli3]

I'm Glad you Figured it out.

[indrora]

Curiosity strikes, wouldnt doing this be easier:

point start = new point(0,0);
public myform()
{
  this.Location = start;
}
(Whatever function for handling Locationchanged)
{
  this.location = start;
}

The problem with gbertoli's was this.Location refers to the current location of the form. the compiler auto-optimizes things such as s = s and ignores them. It ignored the this.location = this.location call because it was setting itself to itself.