Quick easy Question

[VBGangsta]

Hi, For security for my program i get the HD #. After i get that i need to display it in a text box. I know how to do every thing ecept how to make the variable(HD#) appear in the text box with out pressing a buttun. As u can see the HD# is added to the text box with the event of a button click but i need to know how to put it all in into one thing without pressing a button.(Add the HD# to the text box with out pressing a button) Thanks

Function GetSerialNumber(ByRef strDrive As String) As Integer
        Dim SerialNum As Integer
        Dim Res As Integer
        Dim Temp1 As String
        Dim Temp2 As String
        '
        Temp1 = New String(Chr(0), 255)
        Temp2 = New String(Chr(0), 255)
        Res = GetVolumeInformation(strDrive, Temp1, Len(Temp1), SerialNum, 0, 0, Temp2, Len(Temp2))
        GetSerialNumber = SerialNum 
 
    End Function
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
 
        hi = "" & GetSerialNumber("C:\")
        
        TextBox2.Text = (hi)
 
    End Sub