Opening a file using Shell() command

Hey

I am trying to open up a file using the shell command. The deal with the file is i will not know its file type/extension. When i open up a command prompt, i can just type in "lookatme.jpg" and the default viewer for .jpg opens up.

But, when i try

process_id = Shell("start " & Chr$(34) & file_name & Chr$(34))

or

process_id = Shell( file_name)

where file_name is "C:\temp\myfile.jpg", i am getting errors back.

Any thoughts on how to fix this / what i need to do?

Thanks a bunch
--Xen
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darkxennAsked:
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nffvrxqgrcfqvvcCommented:
Your problem here is that Shell can only open Executable files this includes .exe,.com,.bat extensions. You will need to use ShellExecute API to open other file formats
nffvrxqgrcfqvvcCommented:
' http://msdn.microsoft.com/library/en-us/shellcc/platform/shell/reference/functions/shellexecute.asp

Option Explicit

Private Declare Function ShellExecuteW Lib "shell32" ( _
     ByVal hWnd As Long, _
     ByVal lpOPeration As Long, _
     ByVal lpFile As Long, _
     ByVal lpParam As Long, _
     ByVal lpDir As Long, _
     ByVal nShowCmd As Long) As Long

Public Sub myShell(ByVal wFileName As String)
     If ShellExecuteW(0&, StrPtr("Open"), StrPtr(wFileName), 0&, 0&, 1) > 32 Then
         Debug.Print "Success! Preparing to open file..."
     End If
End Sub

Private Sub Command1_Click()
    myShell "C:\WINDOWS\Web\Wallpaper\Wind.jpg"
End Sub
Mike TomlinsonHigh School Computer Science, Computer Applications, Digital Design, and Mathematics TeacherCommented:
You also have questions involving .Net...

If you are working with VB.Net, then simply use the Process.Start() method:

    Process.Start("C:\temp\myfile.jpg")
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darkxennAuthor Commented:
not using .NET, using 6.0

But, is there any way to get a process id, or process handle from shellexecute, so i can keep it in my shellandwait? I need to know when that file gets closed so i can kill it and then return a status to a calling app.

Thanks a bunch
--Xen
Mike TomlinsonHigh School Computer Science, Computer Applications, Digital Design, and Mathematics TeacherCommented:
nffvrxqgrcfqvvcCommented:
You need to use ShellExecuteEx so you can wait on the process handle that gets returned into the SHELLEXECUTEINFO structure. Idle Minds link is the approach you need to accomplish that however if you have GUI or a form then that Form will freeze while your waiting.

This approach allows your GUI or Form to respond to mouse events, button events, etc. while still waiting

http://Q_21593814.html#15099807

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