Option Explicit
Sub Export_JPG()
Dim Plage As Range
Dim x As Byte
Dim Chemin As String
Dim wks As Worksheet
Chemin = ThisWorkbook.Path & "\" ' a adapter
For Each wks In ActiveWorkbook.Worksheets
If Left(wks.Name, 4) = "plat" Then
x = x + 1
Set Plage = wks.Range("A1:B3")
Application.ScreenUpdating = False
Workbooks.Add: Plage.CopyPicture: ActiveSheet.Paste
With ActiveSheet.ChartObjects.Add(0, 0, Selection.Width, Selection.Height).Chart
.Paste
.Export Chemin & wks.Cells(2, 2).Value & ".jpg", "JPG"
End With
ActiveWorkbook.Close False
End If
Next
End Sub