Sub Internet_Explorer()
Dim taskID As Variant
On Error Resume Next
taskID = Shell("start iexplore.exe")
If Err <> 0 Then _
MsgBox "IEXPLORE.EXE is not installed on your machine."
End Sub
Alternative.........
Right-click a cell and "Hyperlink".
Browse to the other application's *.exe file and OK.
Gord Dibben Excel MVP