Associate a File Extension to a Program

Associate a File Extension to a Program

This tip is an addendum to the VB-2-the-Max tip CreateFileAssociation – Associate a file extension.

The following code shows the complete original tip. The addendum is in bold. Without the additional code, Windows puts a small icon inside a border (like in shortcuts).

Private Declare Sub SHChangeNotify Lib "shell32.dll" (ByVal wEventId As Long, _    ByVal uFlags As Long, ByVal dwItem1 As Long, ByVal dwItem2 As Long)Const SHCNE_ASSOCCHANGED = &H8000000Const SHCNF_IDLIST = 0' Create the new file association'' Extension is the extension to be registered (eg ".cad"' ClassName is the name of the associated class (eg "CADDoc")' Description is the textual description (eg "CAD Document"' ExeProgram is the app that manages that extension (eg "c:CadMyCad.exe")'' NOTE: requires CreateRegistryKey and SetRegistryValue functionsSub CreateFileAssociation(ByVal Extension As String, ByVal ClassName As String, _    ByVal Description As String, ByVal ExeProgram As String)    Const HKEY_CLASSES_ROOT = &H80000000        ' ensure that there is a leading dot    If Left(Extension, 1) <> "." Then        Extension = "." & Extension    End If       ' create a new registry key under HKEY_CLASSES_ROOT    CreateRegistryKey HKEY_CLASSES_ROOT, Extension    ' create a value for this key that contains the classname    SetRegistryValue HKEY_CLASSES_ROOT, Extension, "", ClassName    ' create a new key for the Class name    CreateRegistryKey HKEY_CLASSES_ROOT, ClassName & "ShellOpenCommand"    ' set its value to the command line    SetRegistryValue HKEY_CLASSES_ROOT, ClassName & "ShellOpenCommand", "", _        ExeProgram & " ""%1"""    ' addendum by Andr

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