Try
Activesheet.usedrange
HTH,
Gary Brown

"Le9569" wrote:

Hello,

I do have a macro that let user select an excel file and create a chart.
However, I am unable to run the chart without knowing the number of rows in
the worksheet.

Here is what I have:

ActiveChart.SetSourceData Source:=Sheets("Sheet1"). _
Range("A1:C374"), PlotBy:=xlColumns
ActiveChart.Location Whe=xlLocationAsNewSheet, Name:="Chart1"

The Range("A1:C374") is changing based on the file. How do I get those
dynamically?

Thanks.
le9569