VB6 namespace are provided for use by the tools for upgrading from Visual Basic 6.0 to Visual Basic.
When users enter data into your application, you may want to verify that the data is valid before your application uses it.
These metrics have a greater level of accuracy, no matter what the ranking.
If a site has Certified Metrics instead of estimated, that means its owner has installed code allowing us to directly measure their traffic.
The control also works well when bound to a data source.
The Format event on a data binding can be used to reformat incoming data to comply with the mask, and the Parse event can be used to reformat outgoing data to comply with the specifications of the data field. If you want full programmatic control over validation, or need to perform complex validation checks, you should use the validation events built into most Windows Forms controls.
You enable validation of user input by adding validation controls to your page as you would add other server controls.
There are controls for different types of validation, such as range checking or pattern matching. Each validation control references an input control (a server control) elsewhere on the page.