Drag Drop Woes

[bob]

Hi,
VS2008
Trying to implement a simplified version of Mike Gold's tutorial on
Drag Drop.
My problem is that the dragover event handler never appears to pass
over a node.
I move the 'envelope' all over the tree view but FindTreeNode always
returns null.
The event handler e member appears to contain legiitimate X,Y
co-ordinates but myTreeView.GetN odeAt(X,Y) always returns null;
Any clues as to what I am doing wrong?
thanks
Bob
Code follows:
private void tvInstallation_ DragOver(object sender, DragEventArgs e)
{
//Point p = new Point(e.X,e.Y);
TreeNode aNode = FindTreeNode(e. X, e.Y);
if(aNode!=null)
{
aNode.BackColor = Color.DarkBlue;//NEVER GET HERE
}
}

private TreeNode FindTreeNode(in t X,int Y)
{

return tvInstallation. GetNodeAt(X,Y); //Getting Called but
always returning null

}

[Peter Duniho]

On Tue, 22 Apr 2008 22:40:10 -0700, bob
<st************ **@cutthis.adri ley.co.nzwrote:

[...]
The event handler e member appears to contain legiitimate X,Y
co-ordinates but myTreeView.GetN odeAt(X,Y) always returns null;
Any clues as to what I am doing wrong?

Why do the coordinates appear legitimate to you?

According to MSDN (always a good place to look when things aren't working
as you expect), the X and Y properties of DragEventArgs are given in
screen coordinates. You need to convert them to client coordinates, using
the PointToClient() method of your control, before passing them to
GetNodeAt().

Pete

[bob]

On Tue, 22 Apr 2008 22:56:58 -0700, "Peter Duniho"
<Np*********@nn owslpianmk.comw rote:

>On Tue, 22 Apr 2008 22:40:10 -0700, bob
<st*********** ***@cutthis.adr iley.co.nzwrote :

>[...]
The event handler e member appears to contain legiitimate X,Y
co-ordinates but myTreeView.GetN odeAt(X,Y) always returns null;
Any clues as to what I am doing wrong?

Why do the coordinates appear legitimate to you?

According to MSDN (always a good place to look when things aren't working
as you expect), the X and Y properties of DragEventArgs are given in
screen coordinates. You need to convert them to client coordinates, using
the PointToClient() method of your control, before passing them to
GetNodeAt().

Pete

Right on the money Pete.
Thanks.
Bob.