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Editorial Team
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Asked: 2026-06-01T16:04:53+00:00

My Problem I have read a few chapters, and researched a few websites but

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My Problem

I have read a few chapters, and researched a few websites but none of which fulfil my question, which is where should I put this If statement

Public LoginName As String
Public Password As String

LoginName = txtUserName.Text
Password = txtPassword.Text

If (LoginName = "" Or Password = "") Then
        btnSubmit.BackgroundImage = Image.FromFile("G:\Product\ElderlyEmail\ElderlyEmail\Images\stopbutton.gif")
    Else
        btnSubmit.BackgroundImage = Image.FromFile("G:\Product\ElderlyEmail\ElderlyEmail\Images\GoButton.gif")
    End If

The idea is once the user has finished inputting text into both text-boxes the image on the button changes from a no-go to a green-submit button but unsure what declaration it would go under and which element. I have tried several form elements and declarations but not having the desired effect that I would like

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1 Answer

  1. Editorial Team

    The idea is once the user has finished inputting text into both
    text-boxes the image on the button changes from a no-go to a
    green-submit button

    You can use many methods to achieve this behavior. Perhaps the OnLostFocus of the txtPassword textbox is more suitable since you want the validation to take place when user has finished typing. You could also use the OnTextChanged method on each of your textboxes so the validation will run every time the user is typing.

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