Assuming you are using Windows Forms and not WPF ...
You can detect an 'Enter' keypress via the KeyPress event.
Private Sub TextBox1_KeyPress(sender As Object, e As KeyPressEventArgs)
Handles TextBox1.KeyPress
If e.KeyChar = Microsoft.VisualBasic.ChrW(Keys.Return) Then
MessageBox.Show("Enter")
End If
End Sub
That won't detect focus leaving the textbox via tab or mouse click etc though.
For that you might have to use the Validating event.
Private Sub TextBox1_Validating(sender As Object, e As
System.ComponentModel.CancelEventArgs) Handles TextBox1.Validating
Dim isValid As Boolean
isValid = True ' Check what you need to check here.
If isValid = False Then
e.Cancel = True
End If
End Sub
--
Alan Bourke
alanpbourke (at) fastmail (dot) fm
On Mon, 10 Jan 2022, at 2:14 PM, j...@johnweller.co.uk wrote:
> I am trying to help a friend write an app in VB.Net. I need some code
> to fire when a number is entered into a textbox and Enter pressed, as
> in the Valid event in VFP, but can’t seem to find the appropriate VB
> event – any suggestions gratefully received. I’m asking here because
> it is easier to specify the problem in VFP terms 😊
>
>
>
> TIA
>
>
>
> John
>
>
>
> John Weller
>
> 07976 393631
>
>
>
>
>
> --- StripMime Report -- processed MIME parts ---
> multipart/alternative
> text/plain (text body -- kept)
> text/html
> ---
>
[excessive quoting removed by server]
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