Private Sub Textbox_Change() For i = 1 To Len(txtTiming1.Text) If InStr(1, "abcdefghijiklmnopqrstuvwxyz", Mid(txtTiming1.Text, i, 1)) Then Else txtTiming1.Text = Mid(txtTiming1.Text, 1, i - 1) & Mid(txtTiming1.Text, i + 1) End If Next i End Sub
Private Sub Textbox_Change() Dim i As Integer For i = 1 To Len(Textbox.Text) If InStr(1, "abcdefghijiklmnopqrstuvwxyz", Mid(Textbox.Text, i, 1)) Then Else Textbox.Text = Mid(Textbox.Text, 1, i - 1) & Mid(Textbox.Text, i + 1) End If Next i End Sub
If Not (Char.IsLetter(e.KeyChar)) Then e.Handled = True End If
If (Char.IsNumber(e.KeyChar)) Then e.Handled = True End If
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