Программно ассоциировать файл с программой

' >>> Make an association
'
' MakeFileAssociation(Extension, PathToApplication, ApplicationName, Description, Optional FullIconPath)
'
' Where:
'
' Extension (string) Your new filetypes extension (without the point !)
' PathToApplication (string) The full path (without exe name) of your program
' ApplicationName (string) The exe name (including .exe)
' Description (string) Description of the filetype as shown in the explorer
' FullIconPath (string) Full path of the associated icon (including .ico)
'
'
' >>> Delete an association
'
' DeleteFileAssociation(Extension)
'
' Where:
'
' Extension (string) The filetypes extension you want to delete(without the point !)
'
'
' >>> Check if an association exists
'
' return = CheckFileAssociation(Extension)
'
' Where:
'
' Extension (string) The filetypes extension you want to verify
' return (string) the name of the associated exe, or empty
' if no associated exe-file exists
 
Private Declare Function RegCreateKey Lib "advapi32.dll" Alias "RegCreateKeyA" (ByVal hKey As Long, ByVal lpSubKey As String, phkResult As Long) As Long
Private Declare Function RegSetValue Lib "advapi32.dll" Alias "RegSetValueA" (ByVal hKey As Long, ByVal lpSubKey As String, ByVal dwType As Long, ByVal lpData As String, ByVal cbData As Long) As Long
Private Declare Function RegCloseKey Lib "advapi32.dll" (ByVal hKey As Long) As Long
Private Declare Function RegOpenKey Lib "advapi32.dll" Alias "RegOpenKeyExA" (ByVal hKey As Long, ByVal lpSubKey As String, ByVal ulOptions As Long, ByVal samDesired As Long, phkResult As Long) As Long
Private Declare Function RegQueryValue Lib "advapi32.dll" Alias "RegQueryValueExA" (ByVal hKey As Long, ByVal lpValueName As String, ByVal lpReserved As Long, lpType As Long, ByVal lpData As String, lpcbData As Long) As Long
Private Declare Function RegDeleteKey Lib "advapi32.dll" Alias "RegDeleteKeyA" (ByVal hKey As Long, ByVal lpSubKey As String) As Long
 
Private Const ERROR_SUCCESS = 0&
Private Const ERROR_BADDB = 1&
Private Const ERROR_BADKEY = 2&
Private Const ERROR_CANTOPEN = 3&
Private Const ERROR_CANTREAD = 4&
Private Const ERROR_CANTWRITE = 5&
Private Const ERROR_OUTOFMEMORY = 6&
Private Const ERROR_INVALID_PARAMETER = 7&
Private Const ERROR_ACCESS_DENIED = 8&
 
Private Const KEY_QUERY_VALUE = &H1&
Private Const KEY_CREATE_SUB_KEY = &H4&
Private Const KEY_ENUMERATE_SUB_KEYS = &H8&
Private Const KEY_NOTIFY = &H10&
Private Const KEY_SET_VALUE = &H2&
Private Const MAX_PATH = 260&
Private Const REG_DWORD As Long = 4
Private Const REG_SZ = 1
Private Const READ_CONTROL = &H20000
Private Const STANDARD_RIGHTS_READ = READ_CONTROL
Private Const STANDARD_RIGHTS_WRITE = READ_CONTROL
 
Private Const KEY_READ = STANDARD_RIGHTS_READ Or KEY_QUERY_VALUE Or KEY_ENUMERATE_SUB_KEYS Or KEY_NOTIFY
Private Const KEY_WRITE = STANDARD_RIGHTS_WRITE Or KEY_SET_VALUE Or KEY_CREATE_SUB_KEY
 
Public Const HKEY_CLASSES_ROOT = &H80000000
Public Const HKEY_CURRENT_USER = &H80000001
Public Const HKEY_LOCAL_MACHINE = &H80000002
Public Const HKEY_USERS = &H80000003
 
Public Sub MakeFileAssociation(Extension As String, PathToApplication As String, ApplicationName As String, Description As String, Optional FullIconPath As String)
Dim ret&
If Left(PathToApplication, 1) <> "\" Then PathToApplication = PathToApplication & "\"
'Create a Root entry called .XXX associated with application name
sKeyName = "." & Extension
sKeyValue = ApplicationName
ret& = WriteKey(HKEY_CLASSES_ROOT, sKeyName, "", sKeyValue)
'Set application key and file description
sKeyName = ApplicationName
sKeyValue = Description
ret& = WriteKey(HKEY_CLASSES_ROOT, sKeyName, "", sKeyValue)
'This sets the default icon for XXX_auto_file
If FullIconPath <> "" Then
sKeyName = ApplicationName & "\DefaultIcon"
sKeyValue = FullIconPath & ",0"
ret& = WriteKey(HKEY_CLASSES_ROOT, sKeyName, "", sKeyValue)
End If
'This sets the command line for XXX_auto_file
sKeyName = ApplicationName & "\shell\open\command"
sKeyValue = Chr(34) & PathToApplication & ApplicationName & ".exe" & Chr(34) & " %1"
ret& = WriteKey(HKEY_CLASSES_ROOT, sKeyName, "", sKeyValue)
End Sub
 
Public Sub DeleteFileAssociation(Extension As String)
Dim Application As String
Dim ret&
'check if filetype is registred
Application = ReadKey(HKEY_CLASSES_ROOT, "." & Extension, "", "")
If Application <> "" Then
'delete file extension
ret& = DeleteKey(HKEY_CLASSES_ROOT, "." & Extension)
'delete command lines
ret& = DeleteKey(HKEY_CLASSES_ROOT, Application)
End If
End Sub
 
Public Function CheckFileAssociation(ByVal Extension As String) As String
Extension = "." & Extension
'read in the program name associated with this filetype
CheckFileAssociation = ReadKey(HKEY_CLASSES_ROOT, Extension, "", "")
End Function
 
Public Function ReadKey(ByVal KeyName As String, ByVal SubKeyName As String, ByVal ValueName As String, ByVal DefaultValue As String) As String
Dim sBuffer As String
Dim lBufferSize As Long
Dim ret&
sBuffer = Space(255)
lBufferSize = Len(sBuffer)
ret& = RegOpenKey(KeyName, SubKeyName, 0, KEY_READ, lphKey&)
If ret& = ERROR_SUCCESS Then
ret& = RegQueryValue(lphKey&, ValueName, 0, REG_SZ, sBuffer, lBufferSize)
ret& = RegCloseKey(lphKey&)
Else
ret& = RegCloseKey(lphKey&)
End If
sBuffer = Trim(sBuffer)
If sBuffer <> "" Then
sBuffer = Left(sBuffer, Len(sBuffer) - 1)
Else
sBuffer = DefaultValue
End If
ReadKey = sBuffer
End Function
 
Public Function WriteKey(ByVal KeyName As String, ByVal SubKeyName As String, ByVal ValueName As String, ByVal KeyValue As String) As Long
Dim ret&
ret& = RegCreateKey&(KeyName, SubKeyName, lphKey&)
If ret& = ERROR_SUCCESS Then
ret& = RegSetValue&(lphKey&, ValueName, REG_SZ, KeyValue, 0&)
Else
ret& = RegCloseKey(lphKey&)
End If
WriteKey = ret&
End Function
 
Public Function DeleteKey(ByVal KeyName As String, ByVal SubKeyName As String) As Long
Dim ret&
ret& = RegOpenKey(KeyName, SubKeyName, 0, KEY_WRITE, lphKey&)
If ret& = ERROR_SUCCESS Then
ret& = RegDeleteKey(lphKey&, "") 'delete the key
ret& = RegCloseKey(lphKey&)
End If
DeleteKey = ret&
End Function