Question

I need to know if an executable is available in PATH from a vbscript.
In *nix I would use ‘which’ command to to that.
What do I use in vbscript?
Solution needs to be compatible with WinXP so ‘where’ command is not for me.

Answer 1

I came up with this:

Set wshShell = WScript.CreateObject ("WSCript.shell")
On Error Resume Next
wshshell.run "your_exec", 6, True
If Err.Number <> 0 Then
    WshShell.Popup(Err.Number)
    ' Handle error
    Err.Clear
End If
On Error Goto 0
set wshshell = nothing

The your_exec must be a call to the executable made in such a way that would return immediately, which could be a problem if that executable doesn’t provide some command line option to do so. In my case I’m just calling the executable to show its version: my.exe -version.