i need to find Excel active X object mschart.ocx or mschrt20.ocx.
Where are they laying?
Am i right, that they can help me to use active x chart: msdn
You don't need to know about the OCX to use this control in Excel, support is built-in.
Simply add a chart to your worksheet.
Charts are also exposed in VBA for programmatic use.
As is often the case, if you record a macro while inserting a chart, you will get some code that will point you in the right direction.
Worksheets have a "ChartObjects" collection that you can work with.
You can programmatically add a chart to a worksheet with something like:
UPDATE 2012-05-18: Following up on the comment below. I think that charting is embedded in one of the Excel DLL's.
You can get the chart controls from Microsoft:
(GRRR! I can only put 2 links in here!! I'll add another comment for the other 2)