If you have a combobox for which you don't specify a value for the ColumnWidths property, Visual FoxPro has to figure out itself how wide the dropdown list should be. Basically, Visual FoxPro makes this list just wide enough to fully display its values. However, Visual FoxPro only parses part of the list to determine the actual width of each line. The following code sample demonstrates this behaviour:

On Technet Microsoft states thatthe proper translation for Oracle's NVL2 function:

FileMon is a great utility if you need to debug performance problems in a Visual FoxPro application. After launching FileMon.EXE as an administrator change the filter to "VFP9.EXE" or the name of your application. When you now run your application, you can see all disk activities in your application.