A question abouts graph:s

Is there any way to programmaticly set the type of chart when use the custom-charts?
Like below, instead of the standard charts, can i use any custom?

'Dim GraphObj As Object

'Set GraphObj = Me![ctlGrafSkiva].Object.Application.Chart
'GraphObj.Type = xlColumn

Also, how can I programmaticly add or delete an secondary axis?

Best Regards