AssociateFileType

'make a new project: one form with a commandcontrol
'insert the code on the right places
'make the nessecary changes concerning your application and extension
'look for the * sign!
' Return codes from Registration functions.
Public Const ERROR_SUCCESS = 0&
Public Const ERROR_BADDB = 1&
Public Const ERROR_BADKEY = 2&
Public Const ERROR_CANTOPEN = 3&
Public Const ERROR_CANTREAD = 4&
Public Const ERROR_CANTWRITE = 5&
Public Const ERROR_OUTOFMEMORY = 6&
Public Const ERROR_INVALID_PARAMETER = 7&
Public Const ERROR_ACCESS_DENIED = 8&
Global Const HKEY_CLASSES_ROOT = &H80000000
Public Const MAX_PATH = 256&
Public Const REG_SZ = 1

Private Sub Command1_Click()
  Dim sKeyName As String  'Holds Key Name in registry.
  Dim sKeyValue As String 'Holds Key Value in registry.
  Dim ret&         'Holds error status if any from API calls.
  Dim lphKey&       'Holds created key handle from RegCreateKey.
  'This creates a Root entry called "MyApp".
  sKeyName = "MyApp" '*
  sKeyValue = "My Application" '*
  ret& = RegCreateKey&(HKEY_CLASSES_ROOT, sKeyName, lphKey&)
  ret& = RegSetValue&(lphKey&, "", REG_SZ, sKeyValue, 0&)
  'This creates a Root entry called .BAR associated with "MyApp".
  sKeyName = ".bar" '*
  sKeyValue = "MyApp" '*
  ret& = RegCreateKey&(HKEY_CLASSES_ROOT, sKeyName, lphKey&)
  ret& = RegSetValue&(lphKey&, "", REG_SZ, sKeyValue, 0&)
  'This sets the command line for "MyApp".
  sKeyName = "MyApp" '*
  sKeyValue = "notepad.exe %1" '*
  ret& = RegCreateKey&(HKEY_CLASSES_ROOT, sKeyName, lphKey&)
  ret& = RegSetValue&(lphKey&, "shell\open\command", REG_SZ, sKeyValue, MAX_PATH)
End Sub
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