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treeview with 3 state checkbox

Posted on 2005-05-04
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Last Modified: 2010-05-18

I am looking for a treeview control that has three state checkbox: ticked(true), unticked(neutral) and crossed(false).

If you have used  sql server, it's very much like those where you set table/query permissions, but in a treeview not listview.

idealy it's free...

Thanks very much!
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Question by:ChenChen
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danaseaman earned 1500 total points
ID: 13933557
The standard State ImageList which has the Checkboxes does not support TriState. You can replace it with your own ImageList. See article and code at http://btmtz.mvps.org/treeview/ with sample code at Download tvcheckboxesex.zip (17kb). You will need to add the Grayed(Indeterminate) state images.  You update the State ImageList using SendMessage(hWnd, TVM_SETIMAGELIST, TVSIL_STATE, ByVal himl).

Your best bet may be modifying the VbAccelerator Treeview(free with source code) at http://vbaccelerator.com/home/VB/Code/Controls/treeview/. You also need code to set the check state of child nodes when a parent node is clicked and code to set parent node check state to checked/grayed when a child node is clicked. There is a good Vb.net example of how to do this at http://www.codeproject.com/vb/net/vbnettristatechkbox.asp that you could perhaps adapt to Vb6.

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