Dynamic Function using MySql and VB.Net

Question

I have one function - 

 Public Function GetDataTable(ByVal Query As String) As DataTable

        Dim dtConnection As New OdbcConnection(ConfigurationManager.ConnectionStrings("DBConnection").ToString)

        dtConnection.Open()

        Dim dtTable As New DataTable

        Dim da As OdbcDataAdapter

        da = New OdbcDataAdapter(Query, dtConnection)

        da.Fill(dtTable)

        da.Dispose()

        dtConnection.Close()

        Return dtTable

    End Function

i am using this funtion in my code behind file like this - 

QryStr = "select * from table where UName='" & txtUserName.Text & "'and pwd='" & txtPassword.Text & "'"

dtUsers = DBClass.GetDataTable(QryStr)

so where ever i want to fetch data from database, i am using this function but here statically i am passing query.

i want to pass stored procedure in place of query so how will i create function with parameters so that i will use that function anywhere in application?