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The sequence is the same regardless of how the end user moves the input focus away from the control. NET controls fire these events in the same sequence only if end users move the input focus by means of the keyword; if they use the mouse, the control fires a Lost Focus event, then the Validating event, and – if the validation fails – another Got Focus event to let the application know that the focus is again on the control. NET programs created by VB Migration Partner follow the . In most cases, the fact that the Lost Focus event fires before the Validate event doesn’t affect the application negatively.
For example, consider the following VB6 code: Private Sub Text1_Got Focus() Text1.
(which means error Provider1 will have null (or) be null - I don't exactly understand) I know this is because of something I'm missing to understand using "null".
Doing so can cause your application or the operating system to stop responding.
For more information, see the WM_KILLFOCUS topic in the "Keyboard Input Reference" section, and the "Message Deadlocks" section of the "About Messages and Message Queues" topic in the MSDN library at
The Validate event and the accompanying Causes Validate property are new to VB6 and give programmers a much-needed replacement for older, more cumbersome techniques of field validation.
(See the section in this chapter entitled "Validation With Got Focus and Lost Focus Events".) In general, the best time to validate a field's contents is when the user attempts to leave the field.
datetimepickers, text boxes, combo box) that are populated via a binding source. Data Repeater Item Event Args) _ Handles Data Repeater1.