Weather Web Service

there are no errors showing on the code screen but when I debug it to test it and goes to receive, my message box saying "web service not available" pops up.
It is built with a Text Box for Zip entry, Combo box for Weather or forecast, lblForecast for return. Three buttons Submit, Clear, and Exit. Submit is the one button not working.

The methods are:
GetCityForecastByZIP ( ZIP As string ) As ForecastReturn
Allows you to get your City Forecast Over the Next 7 Days, which is updated hourly. U.S. Only

GetCityWeatherByZIP ( ZIP As string ) As WeatherReturn
Allows you to get your City's Weather, which is updated hourly. U.S. Only

I need an example or step by step to correct. I am new to VB and hitting this wall and feel I'm so close. Thank you in advance for your help im really struggling here.

At the" lblForecast.text = intZipCode.ToString & " " & strWeatherType " it is underlined with the hint variable intZipCode is used before it has been assigned a value. Same for strWeatherType.

Code:

---

Option Strict On

Public Class frmLocalWeather
 
    Private Sub btnSubmit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSubmit.Click
        'Connects to Web Services to give either the weather, temperature, or both for the selected City.
       
        Dim wsWeatherReturn As New com.cdyne.wsf.Weather
        Dim wsWeather1 As New com.cdyne.wsf.WeatherReturn
        Dim intZipCode As String
        Dim strTempType As String
        Dim strWeatherType As String

        Try

            intZipCode = Convert.ToString(txtZip.Text)
            wsWeather1 = wsWeatherReturn.GetCityWeatherByZIP("37066")

        Catch Exception As FormatException
            'Detects if information is missing
            MsgBox("Select a Zip and Weather Type", , "Error")
        Catch Exception As OverflowException
            'This catch Block detects numbers that are to Large
            MsgBox("Please enter Zip Code")
        Catch Exception As SystemException
            'This catch block detects a generic exception.")
            MsgBox("Entry invalid. Please enter a valid Zip Code")
        End Try


        'Select Weather or Temperature
        If (cboWeather.SelectedIndex > -1) Then
            strTempType = CStr(cboWeather.SelectedIndex)
            Try
                Select Case strTempType
                    Case CStr(0)
                        wsWeather1 = wsWeatherReturn.GetCityWeatherByZIP("37066")
                        strWeatherType = " Temperature "
                    Case CStr(1)
                        wsWeather1 = wsWeatherReturn.GetCityWeatherByZIP("37066")
                        strWeatherType = " Weather "
                    Case CStr(2)
                        wsWeather1 = wsWeatherReturn.GetCityWeatherByZIP("37066")
                        strWeatherType = " Both "
                End Select
                'Produce Weather or temp
                LblForecast.Text = intZipCode.ToString & " " & strWeatherType
            Catch Exception As SystemException
                MsgBox("Web Service Not Available", , "Error")
            End Try
        Else
            MsgBox("Select a Zip and Weather type")
        End If
    End Sub


    Private Sub btnClear_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnClear.Click
        txtZip.Text = ""
        LblForecast.Text = ""
        cboWeather.Text = ""

    End Sub

    Private Sub btnExit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExit.Click
        Close()
    End Sub


    Private Sub frmLocalWeather_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        'Clear Forecast Label
        LblForecast.Text = ""

    End Sub

End Class

---

In the MsgBox("Web Service Not Available", , "Error") line, display the actual error from the exception. It will probably give you more information on what is wrong.

Another alternative (i.e. a better one) is add a couple of breakpoints and step through your code in the debugger. That way you can inspect the variables in your program at run time and figure out the exact line of the failure.