TreeView Mouse event behaviour puzzles

[Plumer]

Hello everyone,

I am using MS .NET Framework 1.0 Version 1.0.3705 developing a C# client
application using SQL Server on the server side.

I am looking to implement drag & drop in a TreeView control. The operation
takes place entirely within this single control. There is no need to provide
for interaction with other controls, forms, applications etc. Both the drag
source item (a TreeNode) and the drag target item (another TreeNode) are
within the same TreeView.

I have tried using the ItemDrag/DoDragDrop/DragDrop approach but it isn't
cooperating. The DragDrop event just does not fire. NB: TreeView.AllowD rop =
true. Anyway, I thought I would use the old approach of
MouseDown/MouseMove/MouseUp but that isn't working either.

Even though this question is framed in the context of an attempt to
implement drag & drop, this is not really a question about that process. When
I changed to the MouseDown/MouseMove/MouseUp approach the MouseDown/MouseUp
pair started exhibiting some very strange behaviour.

The MouseDown Event is followed immediately by a MouseUp event even
though the mouse button has not been released.

This code:
///_______________ _______________ _______________ ___________
private void TvwManager_Mous eDown(object sender,
System.Windows. Forms.MouseEven tArgs e)
{
System.Console. WriteLine("Mana ger_MouseDown") ;
}
///_______________ _______________ _______________ _______________ ______
private void TvwManager_Mous eUp(object sender,
System.Windows. Forms.MouseEven tArgs e)
{
System.Console. WriteLine("Mana ger_MouseUp" );
}
///_______________ _______________ _______________ _______________ ______
private void TvwManager_Mous eMove(object sender,
System.Windows. Forms.MouseEven tArgs e)
{
System.Console. WriteLine("Mana ger_MouseMove" );
}

Produces this result:

Manager_MouseMo ve
....
Manager_MouseMo ve
Manager_MouseDo wn
Manager_MouseUp
Manager_MouseMo ve
....
Manager_MouseMo ve
Manager_MouseDo wn
Manager_MouseUp
....

Explained as follows
**cursor enters the control, start receiving MouseMove events
Manager_MouseMo ve
....Numerous MouseMove events occur in succession here
Manager_MouseMo ve
**Left Mouse button pressed and held down
Manager_MouseDo wn <<MouseDown occurs -- just as it should
Manager_MouseUp <<MouseUp follows immediately even though the mouse button
has not been released
Manager_MouseMo ve <<This sequence of MouseMoves occurs while the button is
down
....
**Left button is released but, of course, the MouseMove events keep coming
Manager_MouseMo ve

Manager_MouseDo wn <<Try it again...Sequenc e described above repeats: MouseDown
Manager_MouseUp <<followed immediately by MouseUp
etc...

What is going on here? Has anyone else observed this behaviour?
What's to be done about it?

--
Kia pai t� haere, e hoa m�!
N� Plumer