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Vb net textbox event validating

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Success Then Msg Box("Please enter alpha text only.") Text Box1.i am making application in which there are 10 textbox in which i am changing background color when it got focus and lost focus. is there any way i can set or add custom code that every textbox added in form change color on got focus and lost focus and can assign textbox validation number only, alphanumeric. Back Color = interface Focus Txt Color End Sub One way, which I am using myself often, is to make an array of textboxes.However, the validation does not happen if the user click on on without entering any data.Is there any way to force the validation of all controls when the user click on OK?

However, for code readability, it would make sense to place all validation code in the Validating event.I am doing a simple aplication using Windows Forms and I have a question... My form has 15 textboxs and I want to validate everyone using the event Key Press or validating. Set Error(txt, "") Else something(txt.text) End If End Sub Notice how I assign each one of the Textbox's Key Press Event Handler to the single Numeric Validation_Key Press sub routine.I've a winforms with some controls and an Error Provider.And in the case where some validation failed, how would I know and cancel the OK event? Validate Children to force the validation of all the controls on the form, as long as they support validation.