Newsgroup: it.comp.lang.visual-basic
Titolo: [VB6] aprire un file con programma predefinito

Ciao,
con un file eseguibile ed il seguente comando tutto andava a buon fine:
RetVal = Shell("C:\occhio\db\tetris.exe", vbNormalFocus)
se invece voglio aprire un file qualsiasi con il suo programma predefinito
mi và in errore. Cioè se scrivo:
RetVal = Shell("C:\occhio\db\config.db3", vbNormalFocus)
va in errore " Chiamata di routine o argomento non valido"
esiste un comando specifico per file non eseguibili?
Grazie
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Con Shell puoi aprire solo eseguibili (e nemmeno tutti, solo quelli con 
estensione .exe). Io l'ho abbandonata dopo che ho notato che su macchine 
diverse (con lo stesso SO) presentava comportamenti diversi (su una 
funzionava, sulla seconda no). Insomma, mi son fatto l'idea che produca 
codice troppo fragile (magari mi sbaglio, eh).
Ciao.
eSQueL 

Io usavo ShellExecute.
Da API-Guide:
Declare Function ShellExecute Lib "shell32.dll" Alias "ShellExecuteA" (ByVal 
hwnd As Long, ByVal lpOperation As String, ByVal lpFile As String, ByVal 
lpParameters As String, ByVal lpDirectory As String, ByVal nShowCmd As Long) 
As Long
· hwnd
Specifies a parent window. This window receives any message boxes that an 
application produces. For example, an application may report an error by 
producing a message box.
· lpOperation
Pointer to a null-terminated string that specifies the operation to perform. 
The following operation strings are valid:
"open"
 The function opens the file specified by lpFile. The file can be an 
executable file or a document file. The file can be a folder to open.
"print"
 The function prints the file specified by lpFile. The file should be a 
document file. If the file is an executable file, the function opens the 
file, as if "open" had been specified.
"explore"
 The function explores the folder specified by lpFile.
The lpOperation parameter can be NULL. In that case, the function opens the 
file specified by lpFile.
· lpFile
Pointer to a null-terminated string that specifies the file to open or print 
or the folder to open or explore. The function can open an executable file 
or a document file. The function can print a document file.
· lpParameters
If lpFile specifies an executable file, lpParameters is a pointer to a 
null-terminated string that specifies parameters to be passed to the 
application.
If lpFile specifies a document file, lpParameters should be NULL.
· lpDirectory
Pointer to a null-terminated string that specifies the default directory.
· nShowCmd
If lpFile specifies an executable file, nShowCmd specifies how the 
application is to be shown when it is opened. This parameter can be one of 
the following values:
SW_HIDE
 Hides the window and activates another window.
SW_MAXIMIZE
 Maximizes the specified window.
SW_MINIMIZE
 Minimizes the specified window and activates the next top-level window in 
the Z order.
SW_RESTORE
 Activates and displays the window. If the window is minimized or maximized, 
Windows restores it to its original size and position. An application should 
specify this flag when restoring a minimized window.
SW_SHOW
 Activates the window and displays it in its current size and position.
SW_SHOWDEFAULT
 Sets the show state based on the SW_ flag specified in the STARTUPINFO 
structure passed to the CreateProcess function by the program that started 
the application. An application should call ShowWindow with this flag to set 
the initial show state of its main window.
SW_SHOWMAXIMIZED
 Activates the window and displays it as a maximized window.
SW_SHOWMINIMIZED
 Activates the window and displays it as a minimized window.
SW_SHOWMINNOACTIVE
 Displays the window as a minimized window. The active window remains 
active.
SW_SHOWNA
 Displays the window in its current state. The active window remains active.
SW_SHOWNOACTIVATE
 Displays a window in its most recent size and position. The active window 
remains active.
SW_SHOWNORMAL
 Activates and displays a window. If the window is minimized or maximized, 
Windows restores it to its original size and position. An application should 
specify this flag when displaying the window for the first time.
If lpFile specifies a document file, nShowCmd should be zero.
Ciao!
    Alex

kovaski0 wrote:

mi pare che devi usare Start:
RetVal = Shell("Start C:\occhio\db\config.db3", vbNormalFocus)
hth

kovaski0 ha scritto:

Leggi sui registri che eseguibile apre quel file e quale è la corretta 
sintassi da usare, poi sostituisci il %1 con il file da aprire ed il 
gioco è fatto!
Ciao Ale

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