Yes it is possible but need more details.
Here is an example of VBA using Shell to run a small utility application.
Sub Convert_units()
On Error Resume Next
Shell ("C:\Utilities\Convert\Converter.exe"), vbNormalFocus
If Err <> 0 Then _
MsgBox "Converter.exe is Missing"
End Sub
Gord Dibben MS Excel MVP
On Mon, 24 May 2010 08:23:02 -0700, Stephen Miller <Stephen