Vb net combobox validating event
The last thing we need is for a Message Box to pop up when we tab away from a field, telling us it's invalid. Also, we don't want all the validation done when the user presses the OK button, because they could then potentially be given a great big message with all the fields that are wrong.
VB6 controls fire the Validate event first and then the Lost Focus event; if the Validate sets Cancel=True, then the Lost Focus event is never fired.
The Tab Index allows you to set the Tab order for all the controls on your form.
With Text Box1 selected, click the lightning bolt in the properties area to see a list of events for textboxes.
Text = "") End Sub Now consider the corresponding VB. If the end user clicks on a different control and Text1 contains an empty string, the Lost Focus event resets the background color to white, then the Validate event cancels the focus shift, and finally the Got Focus event changes the background color to yellow again. If this is the case, the converted code might fail or behave unexpectedly.
In such cases, you can force the controls in the support library to behave more closely to the original VB6 controls by setting the VB6Config.