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ToolStripItem.DragDrop Event

Occurs when the user drags an item and the user releases the mouse button, indicating that the item should be dropped into this item.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

[BrowsableAttribute(false)]
public event DragEventHandler DragDrop

The X and Y properties of the DragEventArgs are in screen coordinates, not client coordinates. For more information about handling events, see Handling and Raising Events.

The following code example shows how to convert the X and Y properties to a client Point. This code example is part of a larger example provided for the ToolStripRenderer class.

// This method defines the DragOver event behavior.  
protected override void OnDragOver(DragEventArgs dea)
{
    base.OnDragOver(dea);

    // Get the ToolStripButton control  
    // at the given mouse position.
    Point p = new Point(dea.X, dea.Y);
    ToolStripButton item = this.GetItemAt(
        this.PointToClient(p)) as ToolStripButton;

    // If the ToolStripButton control is the empty cell, 
    // indicate that the move operation is valid. 
    if( item == this.emptyCellButton )
    {
        // Set the drag operation to indicate a valid move.
        dea.Effect = DragDropEffects.Move;
    }
}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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