I need a help for adding icon for my file association to be visible not as unknown file format i the explorer............

I'm assuming you're referring to the exe file produced when you compile your project. The project can be given an icon in the project properties.

I need a help for adding icon for my file association to be visible not as unknown file format i the explorer............

TRY THE FOLLOWING CODE :-

' This module enables you to create file association to
' your program in the registry. Your own filetype will also
' have its own icon, created by you. Usefull when you have
' a program that uses it's own filetype. There are only three
' subs required to keep it simple.
'
' Opening the associated files with explorer will start the
' associated program and send the filename (and trailing prompts)
' to the command function in your program. To use the Command
' function, put it into the main module or the load-event of your
' program and tranfer it's string to your programcode.
' This feature is handy to start automaticly your program and
' open, load or procces the opened file. The syntax is very simple:
' MyString = Command ,where Mystring will contain the files name
' including all trailing prompts. You will have to write some code
' to let your program procces a file, passed through Command, or
' start your program without file if Command is empty.
'
' Finally, there's the function to check if a given association exist.
' This one comes in handy when you want to create a button to like
' "Add/Remove Filetype"
'
' IMPORTANT NOTICE: Applying a new file association will only be
' effective AFTER computer restart !!!
'
'
' >>> 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

NICE CODE...working

.but i have another question, how could i open that file directly to my program?

..many thanks

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