In the screenshot of the tree-view (above) zero level nodes are the names of the customers, level one nodes are the order-dates, and level two nodes are the products ordered on the level one date. The level of a node means its logical position in the X-Axis. The use of query names with postfix numbers is my way of grouping associated functionality together in the order in which it is used – on large systems you get lost trying to dream up meaningful names! Queries prefixed with hqry mean that this would normally be a hidden query. Tables prefixed with z mean that they are local and, usually, their content is temporary. How Does it Work?Īfter creating an Access database, I incorporated some tables from the Northwind Traders database. The numbers on the right hand side indicate the children belonging to each node – these are optional. The control is designed to allow the user to select an individual node by clicking the check-box or using the arrow keys to open, close, or to move the focus up and down the tree. This control is constructed from an Access form and an underlying local table. As an aside, a really good solution to fixing the problem can be found here. The last instance of the control breaking led me to accept that the best way to avoid the problem from now on would be to write my own.
#ACCESS VBA CODE EXAMPLES CODE#
This article addresses the need for a ‘native’ tree-view control constructed with Access tables, forms, and code to get around the problem. From time to time, the control is updated which sometimes leads to applications breaking.
#ACCESS VBA CODE EXAMPLES WINDOWS#
Microsoft Access does not have a native tree or list view control – we have to rely on a Windows control called MSCOMCTL.OCX to provide these services.
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