/// <summary>
/// This method will use the GetUIObjectOf method of IShellFolder to obtain the IDropTarget of a
/// ShellItem.
/// </summary>
/// <param name="item">The item for which to obtain the IDropTarget</param>
/// <param name="dropTargetPtr">A pointer to the returned IDropTarget</param>
/// <returns>the IDropTarget from the ShellItem</returns>
public static bool GetIDropTarget(ShellItem item, out IntPtr dropTargetPtr, out IDropTarget dropTarget)
{
ShellItem parent = item.ParentItem != null ? item.ParentItem : item;
if (parent.ShellFolder.GetUIObjectOf(
IntPtr.Zero,
1,
new IntPtr[] { item.PIDLRel.Ptr },
ref NativeShellAPI.IID_IDropTarget,
IntPtr.Zero,
out dropTargetPtr) == NativeShellAPI.S_OK)
{
dropTarget =
(IDropTarget)Marshal.GetTypedObjectForIUnknown(dropTargetPtr, typeof(IDropTarget));
return(true);
}
else
{
dropTarget = null;
dropTargetPtr = IntPtr.Zero;
return(false);
}
}
/// <summary>
/// This method will use the GetUIObjectOf method of IShellFolder to obtain the IDropTarget of a
/// ShellItem.
/// </summary>
/// <param name="item">The item for which to obtain the IDropTarget</param>
/// <param name="dropTargetPtr">A pointer to the returned IDropTarget</param>
/// <returns>the IDropTarget from the ShellItem</returns>
public static bool GetIDropTarget(ShellItem item, out IntPtr dropTargetPtr, out IDropTarget dropTarget)
{
ShellItem parent = item.ParentItem != null ? item.ParentItem : item;
if (parent.ShellFolder.GetUIObjectOf(
IntPtr.Zero,
1,
new IntPtr[] { item.PIDLRel.Ptr },
ref NativeShellAPI.IID_IDropTarget,
IntPtr.Zero,
out dropTargetPtr) == NativeShellAPI.S_OK)
{
dropTarget =
(IDropTarget)Marshal.GetTypedObjectForIUnknown(dropTargetPtr, typeof(IDropTarget));
return true;
}
else
{
dropTarget = null;
dropTargetPtr = IntPtr.Zero;
return false;
}
}