How Show Loading form whenever Application Loads or Fetch Large Data from Database

Please help to implement this code whenever my application loads while database operations

I've code like this

Private bgw As New BackgroundWorker
Public Sub showLoading()
    bgw.WorkerSupportsCancellation = True
    
    AddHandler bgw.DoWork, AddressOf bgw_doWork
    AddHandler bgw.RunWorkerCompleted, AddressOf bgw_Complete
    
    If Not bgw.IsBusy = True Then
        bgw.RunWorkerAsync()
    End If
End Sub

Public Sub closeLoading()
    If bgw.WorkerSupportsCancellation = True Then
        bgw.CancelAsync()
    End If
End Sub

Private Sub bgw_doWork(ByVal sender As Object, ByVal e As DoWorkEventArgs)
    Dim worker As BackgroundWorker = CType(sender, BackgroundWorker)
    Dim loadingScreen As New frmLoading
    
    
    loadingScreen.Show()
    
    While True
        If Not bgw.CancellationPending Then
            Threading.Thread.Sleep(50)
        Else
            e.Cancel = True
            Exit While
        End If
        End While
    End Sub
    
    Private Sub bgw_Complete(ByVal sender As Object, ByVal e As RunWorkerCompletedEventArgs)
        Dim lstFrm As New List(Of frmLoading)
        lstFrm = Application.OpenForms.OfType(Of frmLoading)()
        
        If lstFrm.Count > 0 Then
            For Each frm As frmLoading In lstFrm
                frm.Close()
            Next
        End If
    End Sub

Please help me how to call this method to multiple forms whenever needed