VB TreeView DoubleClick

This can easily be done using the EventVB.dll, downloadable from http://www.MerrionComputing.com/Download/index.htm thus:

'\\ Declarations..
option Explicit

Dim withevents vbLink as EventVB.APIFunctions
Dim withevents vbWndTree as EventVB.ApiWindow

private Sub Form_Load()

set vbLink = new EventVB.APIFunctions

'\\ Subclass the treeview control
set vbWndTree = new EventVB.ApiWindow
vbWndTree.hWnd = me.TreeView1.hWnd
vbLink.SubclassedWindows.Add vbWndTree

End Sub

private Sub Form_Unload(Cancel as Integer)

'\\ Stop subclassing the treeview control
vbLink.SubclassedWindows.Remove vbWndTree
set vbWndTree = nothing
set vbLink = nothing

End Sub

private Sub vbWndTree_WindowMessageFired(byval msg as EventVB.WindowMessages, byval wParam as Long, byval lParam as Long, Cancel as Boolean, ProcRet as Long)

'\\ If double clikc occurs, deal with it..
If msg = WM_LBUTTONDBLCLK then
MsgBox "Left button double clicked on treeview"
End If

End Sub

Hope this helps,
Duncan

---------------
Ex. Datis: Duncan Jones
Merrion Computing Ltd
http://www.merrioncomputing.com
Check out the new downloads - ImageMap.ocx is the VB control that emulates an HTML image map, EventVB.OCX for adding new events to your VB form and adding System Tray support simply, MCL Hotkey for implemenmting system-wide hotkeys in your application...all with source code included.

John is right. TreeView has DblClick event

Iouri Boutchkine
iouri@hotsheet.com

If you don't think the following method is too stupid, we can still get the DblClick event through the TreeView control, and refer to the selected node by calling TreeView1.SelectedItem.

private Sub TreeView1_DblClick()
MsgBox TreeView1.SelectedItem.Text
End Sub



Just an idea.

Regards,

Michi

In the DblClick event you need to do a HitTest, to check whether DblClick happened over a node, or empty space

private Sub TreeView1_DblClick(...)
dim oNode as Node
set oNode = TreeView1.HitTest(x, y)
if oNode is nothing then
'Clicked empty space
else
'oNode is the Node that was double
'clicked, do whatever
endif
end sub

hope this helps

The MouseDown event fires before the DblClick, so you could save the x and y in Form-Level variables so that they are available at the time of the DblClick.

Alternatively you could use the GetCursorPos API function. This will give you the co-ords of the mousepointer. The problem is they are in Pixels (as all API functions do) and they are relative to the screen, so you have to do some arithmetic to get them relative to your treeview, and in the same scalemode (usually twips)

Hope this helps