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But when I move from these textboxes to a combobox, the event is not fired. Two of the textboxes react on the validating event. But when I move from these textboxes to a combobox, the event is not fired. That is, focus returns to the textbox and waits for further input.With a message box, the e.cancel seems to be ignored and focus moves to the next control. Text Do you mean where it says "do some success stuff"?The code checks to see if the item has already been selected.If it has then a message pops up telling the user about the problem.In the indeterminate state, the check box is grayed out. To enable the indeterminate state, the Three State property of the check box is set to be True.
The before change table event gives you the ability to write macro code to perform data manipulation and validation before a data change takes place.To try this beforeupdate example out on your computer you can go to our download center and download the single-user inventory demo database. Net in a textbox validating event, if we do not have the message box it acts as expected.WINDOWS FORMS I've a form that has a textbox that allows the user to enter a string. On the Lost Focus event, the textbox formats the string into a preferred format.