Execute Multiple queries in Windows Aplication using C# and VB.Net

I have a Windows Application.

I want to run two sql queries.

How can i do that in vb?

If TextBox103.Text <> "" Or TextBox104.Text <> "" Then
    'If CheckBox15.Checked = False Then
    'MsgBox("Invalid User Credentials, You Must Log in....")
    'Exit Sub
    'Else
    If TextBox103.Text <> "" Or TextBox104.Text <> "" Or TextBox102.Text <> "" Or TextBox101.Text <> "" Then
        SQL.RunQuery("SELECT * FROM Report1 WHERE Report1.tank_name = '" & ComboBox13.Text & "' and Report1.material_name = '" & ComboBox14.Text & "' ")
 
        If SQL.SQLDS.Tables(0).Rows.Count > 0 Then
            MsgBox("Tank Already filled with another Material!")
            Exit Sub
        Else
            CreateUserX6()
            'MsgBox("Instance is added to Report!")
        End If
    End If
    TextBox103.Clear()
    TextBox104.Clear()
    TextBox101.Text = 0.0
    TextBox102.Text = 0.0
    GetReadingXX71(ComboBox14.Text)
    GetReadingX784(ComboBox13.Text)
    GetReadingX785()
End If