Shared Function GetPrivateProfileSectionNames( _

static extern uint GetPrivateProfileSectionNames(IntPtr lpszReturnBuffer,

    Dim len As Int32 = GetPrivateProfileSectionNames(ptr, 1024, IniPath)

static extern uint GetPrivateProfileSectionNames(IntPtr lpszReturnBuffer,

    uint bytesReturned = GetPrivateProfileSectionNames(pReturnedString, MAX_BUFFER, m_iniFile);

    Shared Function GetPrivateProfileSectionNames( _

static extern uint GetPrivateProfileSectionNames(IntPtr lpszReturnBuffer,

    Dim len As Int32 = GetPrivateProfileSectionNames(ptr, 1024, IniPath)

static extern uint GetPrivateProfileSectionNames(IntPtr lpszReturnBuffer,

    uint bytesReturned = GetPrivateProfileSectionNames(pReturnedString, MAX_BUFFER, m_iniFile);

If you need to get all the section names by passing a null lpAppName or all the key names by passing a null lpKeyName, then you'll need to use a technique like is shown for [GetPrivateProfileSection] to handle the double null-terminated result. .NET's marshaler will truncate the StringBuilder at the first null it finds, so to get back the full double null-terminated result string, you have to manage your own memory buffer.