If you use Liberty BASIC Workshop to create the outline code for a Tree View, it incorporates a SUB treeview1Click which is documented thus: "You must SendMessageA for each node ID to see if it is selected". The implication is that if you have a large tree, with maybe hundreds or thousands of nodes, you must cycle through every node ID checking to see if it is selected (clicked) or not.
In fact there's a much easier method. You can directly ask the Tree View control which node is currently selected; this is just a single message, however large the tree is:
Code:Sub TreeViewClick
calldll #user32, "SendMessageA", hwndTreeView1 as ulong, _
_TVM_GETNEXTITEM as long, _TVGN_CARET as long, _
0 as long, sel as long
if sel <> SelectedNode then
SelectedNode = sel
notice "Clicked node ";sel
end if
End Sub
You would typically call this SUB from a timer. The variable SelectedNode must be declared as a GLOBAL for the click-detection to work.
Richard.
Logged