limiting the decimal point to 1

[RhinoBull]

Here is another approach - it's not perfect (just a quick sample) so you may need to work with code written in the Text1_Change() evnt handler:

Option Explicit
 
Private Const GWL_STYLE = (-16)
Private Const ES_NUMBER = &H2000&
 
Private Declare Function GetWindowLong _
    Lib "user32" Alias "GetWindowLongA" _
    (ByVal hwnd As Long, ByVal nIndex As Long) As Long
 
Private Declare Function SetWindowLong _
    Lib "user32" Alias "SetWindowLongA" _
    (ByVal hwnd As Long, ByVal nIndex As Long, _
    ByVal dwNewLong As Long) As Long
 
Private Sub Form_Load()
'========================
Dim curStyle&, newStyle&
 
    'allow numeric entries only
    Text1.Text = ""
    curStyle = GetWindowLong(Text1.hwnd, GWL_STYLE) Or ES_NUMBER
    newStyle = SetWindowLong(Text1.hwnd, GWL_STYLE, curStyle)
    
End Sub
 
Private Sub Text1_Change()
    If IsNumeric(Text1.Text) Then
        Text1.Text = Format(Text1.Text, "0.0")
    End If
End Sub

[RhinoBull]

Also, take a look at Martin's NumberTextbox sample.