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Shell Command only Works Sometimes.  HELP!

Posted on 1999-11-09
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Last Modified: 2010-05-02
I've written an image viewing application in VB6 Pro.  A user views images stored on his/her computer in an image box and can do various things like editing.  Basically, the user configures my program to work with their favorite graphics editor.  I save this info to the registry without a problem.  Anyway, there's a huge bug in my edit routine.  I found it today when I installed my program on someone else's computer.  And MS Paint was the problematic editor, even for BMP files.

Here's the code I use to bring the image up in the selected editor:

Private Sub mnuFileEdit_Click()
    Dim dblRetVal As Double
    Dim strReply As String
    If m_EditorChoice = "" Then
        strReply = MsgBox("You must choose a graphic editing " _
                & "program on your system to edit " _
                & vbCrLf & "images that you view." _
                & vbCrLf & vbCrLf _
                & "Click Preferences ---> Graphics Editor on " _
                & "the Lucid P.i.X. menu to " _
                & vbCrLf & "make your selection.", _
                vbOKOnly, "Graphic Editor Not Chosen")
        Exit Sub
    End If
    If m_SelectedFile = "" Then
        strReply = MsgBox("You must select a file in the file list box" _
                & vbCrLf & " before you can edit.", _
                "File not selected for edit")
        Exit Sub
    Else
        dblRetVal = Shell(m_EditorChoice & " " & m_SelectedFile, 1)
    End If
End Sub

SelectedFile is the pathname and filename of the file to edit.  My editors (PhotoPaint, Debabelizer, etc.) work fine, but others (like Paint and NetStudio) will not recognize the path and filenames that have spaces in them.  For instance a file, Dog.bmp in the My Documents folder will produce an annoying error like "My.bmp not found."  This only happens with some editors, so I'm at a loss as to how to work this out.  These same editors will open these files on their own, just not from my program.  I'd be grateful for any ideas.
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Question by:ljklinsky
2 Comments
 
LVL 32

Accepted Solution

by:
Erick37 earned 200 total points
ID: 2195859
Convert the long names into short path names using GetShortPathName API:

Private Declare Function GetShortPathName Lib "kernel32" _
         Alias "GetShortPathNameA" (ByVal lpszLongPath As String, _
         ByVal lpszShortPath As String, ByVal cchBuffer As Long) As Long
         
Private Function GetShortName(ByVal sLongFileName As String) As String
    Dim lRetVal As Long
    Dim sShortPathName As String
    Dim iLen As Integer
    'Set up buffer area for API function call return
    sShortPathName = Space(255)
    iLen = Len(sShortPathName)
    'Call the function
    lRetVal = GetShortPathName(sLongFileName, sShortPathName, iLen)
    'Strip away unwanted characters.
    GetShortName = Left(sShortPathName, lRetVal)
End Function

Private Sub Command1_Click()
Debug.Print GetShortName(App.Path)
End Sub
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Author Comment

by:ljklinsky
ID: 2196777
Bless you! :)
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