VB.NET Run existing functions in a background.

Hi, I have some functions that are sending requests to my webserver in order to obtain data,
however when those functions are called, form is freezing up because it's not run via backgroundworker.

Now I need to know what is the easiest way to call them functions without freezing a form.

Function example:

    Public Sub PreSave()
        Try
            Dim response As New String(SendRequest("presavecheck.php?id=" & PCID & "&date=" & TodaysDate))
            If response = "SAVENEWRECORD" Then
                SavetoDB()
            ElseIf response = "UPDATEEXISTINGRECORD" Then
                UpdateDB()
            End If
        Catch
        End Try
    End Sub

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Maybe there is a way to create and start a backgroundworker with a functions name to run. For example:

MyBackgroundWorker.RunWorkerAsync(Presave())
so it would do whatever the function has to do and then after that I could run something like:
MyBackgroundWorker.CancelAsync

Thank you.