Why does it "seem" like you can't get the information? What happens? Where do you declare the host, _iXCoorRelative and _iYCoorRelaive variables, and where do you specify the values for them? You send the contents of the Tag object of the button as sender to the Move method, then you reference the contents as a Button object. Do you really store a reference to a button in the Tag object of the button? --- b { font-weight: normal; }

The tempArray and ButtonArray comes from here in the main form ButtonArray btnArray; ButtonArray tempArray; <...> private void Form1_Load(object sender, System.EventArgs e) { btnArray = new ButtonArray(this); tempArray = new ButtonArray(this); } Both ButtonArrays come from this class using System; namespace ButtonArray { /// /// Summary description for ButtonArray. /// public class ButtonArray : System.Collections.CollectionBase { private readonly System.Windows.Forms.Form HostForm; public System.Windows.Forms.Button AddNewButton() { // Create a new instance of the Button class. System.Windows.Forms.Button aButton = new System.Windows.Forms.Button(); // Add the button to the collection's internal list. this.List.Add(aButton); // Add the button to the controls collection of the form // referenced by the HostForm field. HostForm.Controls.Add(aButton); // Set intial properties for the button object. aButton.Top = Count * 25; aButton.Left = 100; aButton.Tag = this.Count; aButton.Text = "Button " + this.Count.ToString(); aButton.Click += new System.EventHandler(ClickHandler); return aButton; } public ButtonArray(System.Windows.Forms.Form host) { HostForm = host; this.AddNewButton(); } public System.Windows.Forms.Button this [int Index] { get { return (System.Windows.Forms.Button) this.List[Index]; } set { this.List[Index] = value; } } public void RemoveX(int iRemoveX) { // Check to be sure there is a button to remove. if (this.Count > 0) { // Remove the button indexed with the value of iRemoveX HostForm.Controls.Remove(this[iRemoveX-1]); this.List.RemoveAt(this.Count-1); } } public void RemoveButton() { // Check to be sure there is a button to remove. if (this.Count > 0) { // Remove the last button added to the array from the host form // controls collection. Note the use of the indexer in accessing // the array. HostForm.Controls.Remove(this[this.Count -1]); this.List.RemoveAt(this.Count -1); } } public void FlushArray() { // Check to be sure there is a button to remove. if (this.Count > 0) { for(int iButtonIndex = this.Count; iButtonIndex > 0; iButtonIndex--) { // Remove the button indexed with the value of iRemoveX HostForm.Controls.Re

Thanks alot for the help!

Take a look at the ArrayList. :)

Thanks alot!

eclipsedk wrote: C:\Documents and Settings\My Documents\Visual Studio Projects\DragNDrop\DragDrop.cs(359): Method 'DragNDrop.Form1._GetLocalMouseCoordinates(object, System.Windows.Forms.MouseEventArgs)' does not match delegate 'void System.Threading.ThreadStart()' Ahhh, a more decriptive error there could not be. I can't judge the rightness of your overall algorithm, but the problem here is that you're trying to start a method that does not match the parameter list and return value specified by the ThreadStart delegate http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfsystemthreadingthreadstartclasstopic.asp[^]. You can only start methods using that delegate that return void and accept no parameters. _GetGlobalMouseCoordinates matches the delegate. _getLocalMouseCoordinates on the other hand, wants an object and a MouseEventArgs. Share and enjoy. Sean