expression.ExportPicture(FileName, FilterName, Width, Height)
expression An expression that returns a ChartSpace or PivotTable object.
FileName Optional String. Specifies the name of the saved file. If you do not specify this argument, the default file name is “Chart.gif” for a chart workspace or “Pivot.gif” for a PivotTable list.
FilterName Optional String. Specifies the name of the graphics filter that is used. Supported filter names are GIF, JPG, and PNG. The default is GIF.
Width Optional Long. Specifies the width of the graphic, in pixels. You must specify this argument for server-side charts.
Height Optional Long. Specifies the height of the graphic, in pixels. You must specify this argument for server-side charts.
Example
This example saves the chart workspace as a graphics file.
ChartSpace1.ExportPicture "sales.gif", "gif", 320, 240