Common dialog et voisinage réseau
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Contenu du snippet
Ce code permet l'ouverture des boîtes de connexion et de fermeture d'un lecteur réseau
Source / Exemple :
Vous pouvez utiliser les API suivantes :
Public Declare Function WNetConnectionDialog Lib "mpr.dll" _
(ByVal hwnd As Long, _
ByVal dwType As Long) As Long
Public Declare Function WNetDisconnectDialog Lib "mpr.dll" _
(ByVal hwnd As Long, _
ByVal dwType As Long) As Long
Elles permettent l'affichage de la boîte de connexion et de déconnexion d'un lecteur réseau.Une recherche dans la librairie MSDN donne comme résultat :
Specifies a bitmask that gives the resource type.
Currently, this member can be one of the following values:
RESOURCETYPE_ANY All resources
RESOURCETYPE_DISK Disk resources
RESOURCETYPE_PRINT Print resources
...dans la définition de la structure NETRESOURCE :
This structure that holds the network resource data. It is returned during enumeration of resources on the network and during enumeration of currently connected resources.
La section HOWTO: List Local Network Connections with WNetEnumResources contient :
Public Const RESOURCE_CONNECTED = &H1
Public Const RESOURCE_GLOBALNET = &H2
Public Const RESOURCE_REMEMBERED = &H3
Public Const RESOURCETYPE_ANY = &H0
Public Const RESOURCETYPE_DISK = &H1
Public Const RESOURCETYPE_PRINT = &H2
Public Const RESOURCETYPE_UNKNOWN = &HFFFF
Public Const RESOURCEUSAGE_CONNECTABLE = &H1
Public Const RESOURCEUSAGE_CONTAINER = &H2
Public Const RESOURCEUSAGE_RESERVED = &H80000000
Il est exact que la définition exhaustive de ces constantes n'est présente nulle part dans MSDN. Merci Microsoft ;-
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Merci Microsoft ;-
1. Créez un nouveau projet et ajoutez le code suivant au formulaire : Option Explicit
Private Const GMEM_FIXED = &H0
Private Const GMEM_ZEROINIT = &H40
Private Const GPTR = (GMEM_FIXED Or GMEM_ZEROINIT)
Private Declare Function GlobalAlloc Lib "KERNEL32" ( _
ByVal wFlags As Long, ByVal dwBytes As Long) As Long
Private Declare Function GlobalFree Lib "KERNEL32" ( _
ByVal hMem As Long) As Long
Private Declare Sub CopyMemory Lib "KERNEL32" Alias "RtlMoveMemory" _
(hpvDest As Any, hpvSource As Any, ByVal cbCopy As Long)
Private Declare Function CopyPointer2String Lib "KERNEL32" _
Alias "lstrcpyA" ( _
ByVal NewString As String, ByVal OldString As Long) As Long
Private Sub Form_click()
Dim hEnum As Long, lpBuff As Long, nr As NETRESOURCE
Dim cbBuff As Long, cCount As Long
Dim p As Long, res As Long, i As Long
'Setup the NETRESOURCE input structure.
nr.dwUsage = RESOURCEUSAGE_CONTAINER
nr.lpRemoteName = 0
cbBuff = 1000
cCount = &HFFFFFFFF
'Open a Net enumeration operation handle: hEnum.
res = WNetOpenEnum(RESOURCE_CONNECTED, RESOURCETYPE_ANY, _
0, nr, hEnum)
If res = 0 Then
'Create a buffer large enough for the results.
'1000 bytes should be sufficient.
lpBuff = GlobalAlloc(GPTR, cbBuff)
'Call the enumeration function.
res = WNetEnumResource(hEnum, cCount, lpBuff, cbBuff)
If res = 0 Then
p = lpBuff
Cls
'WNetEnumResource fills the buffer with an array of
'NETRESOURCE structures. Walk through the list and print
'each local and remote name.
For i = 1 To cCount
CopyMemory nr, ByVal p, LenB(nr)
p = p + LenB(nr)
Print PointerToString(nr.lpLocalName), _
PointerToString(nr.lpRemoteName)
Next i
Else
MsgBox "Error: " & Err.LastDllError, vbOKOnly, _
"WNetEnumResources"
End If
If lpBuff <> 0 Then GlobalFree (lpBuff)
WNetCloseEnum (hEnum) 'Close the enumeration
Else
MsgBox "Error: " & Err.LastDllError, vbOKOnly, "WNetOpenEnum"
End If
End Sub
Private Function PointerToString(p As Long) As String
'The values returned in the NETRESOURCE structures are pointers to
'ANSI strings so they need to be converted to Visual Basic
Strings.
Dim s As String
s = String(255, Chr$(0))
CopyPointer2String s, p
PointerToString = Left(s, InStr(s, Chr$(0)) - 1)
End Function
2. Ajoutez un nouveau module au projet et ajoutez le code suivant : Option Explicit
Public Type NETRESOURCE
dwScope As Long
dwType As Long
dwDisplayType As Long
dwUsage As Long
lpLocalName As Long
lpRemoteName As Long
lpComment As Long
lpProvider As Long
End Type
Public Declare Function WNetOpenEnum Lib "mpr.dll" Alias _
"WNetOpenEnumA" ( _
ByVal dwScope As Long, _
ByVal dwType As Long, _
ByVal dwUsage As Long, _
lpNetResource As Any, _
lphEnum As Long) As Long
Public Declare Function WNetEnumResource Lib "mpr.dll" Alias _
"WNetEnumResourceA" ( _
ByVal hEnum As Long, _
lpcCount As Long, _
ByVal lpBuffer As Long, _
lpBufferSize As Long) As Long
Public Declare Function WNetCloseEnum Lib "mpr.dll" ( _
ByVal hEnum As Long) As Long
'RESOURCE ENUMERATION.
Public Const RESOURCE_CONNECTED = &H1
Public Const RESOURCE_GLOBALNET = &H2
Public Const RESOURCE_REMEMBERED = &H3
Public Const RESOURCETYPE_ANY = &H0
Public Const RESOURCETYPE_DISK = &H1
Public Const RESOURCETYPE_PRINT = &H2
Public Const RESOURCETYPE_UNKNOWN = &HFFFF
Public Const RESOURCEUSAGE_CONNECTABLE = &H1
Public Const RESOURCEUSAGE_CONTAINER = &H2
Public Const RESOURCEUSAGE_RESERVED = &H80000000
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