Private Sub TextBox1_AfterUpdate()
If TextBox1.Value = "" Then Exit Sub
Select Case IsNumeric(TextBox1.Value)
Case True
MsgBox "OK"
Case False
MsgBox "Not OK"
Case Else
End Select
End Sub
just customize it to suit your needs on what you want to happen when the condition is met or not met
Here is another way. I usually put a command button on my form, that when clicked will go through and verify all entries. So if we just have a command button and a text box on the form, the code would look something like:
Code:
Private Sub CommandButton1_Click()
If Not IsNumeric(TextBox1) Then
MsgBox "Only numbers may be entered in the text box"
TextBox1.Value = ""
End If
End Sub
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