Public Function NumberOfLines(TextBox As TextBox) As Integer
Dim sLines() As String
sLines() = Split(TextBox.Text, vbCrLf)
NumberOfLines = UBound(sLines)
End Function
and this for a Rich text Box
Code:
Public Function NumberOfLines(TextBox As RichTextBox) As Integer
Dim sLines() As String
sLines() = Split(TextBox.Text, vbCrLf)
NumberOfLines = UBound(sLines)
End Function