This may come in the form of simply checking if there is an entry for a field, such as a name or a more complex task such as validating an email address.
Thankfully Win Forms has built in mechanisms to help facilitate data validation.
If they say No, then we should carry on without adding it. The Add Item method is pretty straightforward, but you should realize that even if they say Yes, the new entry will no longer be part of the list soon as the User Form unloads!
If they say Cancel we place them back in the Combo Box (Combo Box1. the Row Source method is slightly more complicated, but the one I would opt for in most cases as the new entry will be permanently part of the list.
A typical case where Causes Validation property is set to False is when there is a cancel button.
There is no need to validate a control that loses focus when the user wishes to cancel out of the form; therefore, the button’s Causes Validation property can be set to false.
In the last lesson we looked at how a Multi Page control could be used.
There are no hard and fast rules for which controls should be used for what purpose, only guides.If you choose to participate, the online survey will be presented to you when you leave the Msdn Web site. A good user interface will validate user input to ensure it is in the correct format.As it turns out, validating controls depends on what type of control and the format of the data you wish to validate.Typically you will be validating text that is provided by a Text Box, but it could also come from a Combo Box where the user can type their selection.Each time you select a menu option that shows a User Form (Tool Options) you don't see a multitude of colors thrust at you simply because Excel is used by millions of people all around the world.