Atributo de solo lectura

Aca ves como usar las apis en pb:
http://www.sybase.com/detail?id=44648
lo especifico:
FUNCTION boolean GetFileVersionInfoA(ref string filename, ulong f_handle, ulong f_length, ref lpdata lpdata2) LIBRARY "version.dll"
para la api que tenes que usar mira esta pagina:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fileio/fs/setfileattributes.asp
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SetFileAttributes
The SetFileAttributes function sets a file's attributes.
BOOL SetFileAttributes(
LPCTSTR lpFileName,
DWORD dwFileAttributes
);
Parameters
lpFileName
[in] Pointer to a string that specifies the name of the file whose attributes are to be set.
In the ANSI version of this function, the name is limited to MAX_PATH characters. To extend this limit to 32,767 wide characters, call the Unicode version of the function and prepend "\\?\" to the path. For more information, see Naming a File.
Windows Me/98/95: This string must not exceed MAX_PATH characters.
dwFileAttributes
[in] File attributes to set for the file. This parameter can be one or more of the following values. However, all other values override FILE_ATTRIBUTE_NORMAL. Attribute Meaning
FILE_ATTRIBUTE_ARCHIVE The file is an archive file. Applications use this attribute to mark files for backup or removal.
FILE_ATTRIBUTE_HIDDEN The file is hidden. It is not included in an ordinary directory listing.
FILE_ATTRIBUTE_NORMAL The file has no other attributes set. This attribute is valid only if used alone.
FILE_ATTRIBUTE_NOT_CONTENT_INDEXED The file will not be indexed by the content indexing service.
FILE_ATTRIBUTE_OFFLINE The data of the file is not immediately available. This attribute indicates that the file data has been physically moved to offline storage. This attribute is used by Remote Storage, the hierarchical storage management software. Applications should not arbitrarily change this attribute.
FILE_ATTRIBUTE_READONLY The file is read-only. Applications can read the file but cannot write to it or delete it.
FILE_ATTRIBUTE_SYSTEM The file is part of the operating system or is used exclusively by it.
FILE_ATTRIBUTE_TEMPORARY The file is being used for temporary storage. File systems avoid writing data back to mass storage if sufficient cache memory is available, because often the application deletes the temporary file shortly after the handle is closed. In that case, the system can entirely avoid writing the data. Otherwise, the data will be written after the handle is closed.
Return Values
If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero. To get extended error information, call GetLastError.
Remarks
The following table describes how to set the attributes that cannot be set using SetFileAttributes.
Attribute How to Set
FILE_ATTRIBUTE_COMPRESSED To set a file's compression state, use the DeviceIoControl function with the FSCTL_SET_COMPRESSION operation.
FILE_ATTRIBUTE_DEVICE Reserved; do not use.
FILE_ATTRIBUTE_DIRECTORY Files cannot be converted into directories. To create a directory, use the CreateDirectory or CreateDirectoryEx function.
FILE_ATTRIBUTE_ENCRYPTED To create an encrypted file, use the CreateFile function with the FILE_ATTRIBUTE_ENCRYPTED attribute. To convert an existing file into an encrypted file, use the EncryptFile function.
FILE_ATTRIBUTE_REPARSE_POINT To associate a reparse point with a file or directory, use the DeviceIoControl function with the FSCTL_SET_REPARSE_POINT operation.
FILE_ATTRIBUTE_SPARSE_FILE To set a file's sparse attribute, use the DeviceIoControl function with the FSCTL_SET_SPARSE operation.
Example Code
For an example, see Retrieving and Changing File Attributes.
Requirements
Client Requires Windows XP, Windows 2000 Professional, Windows NT Workstation, Windows Me, Windows 98, or Windows 95.
Server Requires Windows Server 2003, Windows 2000 Server, or Windows NT Server.
Header Declared in Winbase.h; include Windows.h.
Library Link to Kernel32. Lib.
DLL Requires Kernel32.dll.
Unicode Implemented as SetFileAttributesW (Unicode) and SetFileAttributesA (ANSI). Note that Unicode support on Windows Me/98/95 requires Microsoft Layer for Unicode.
See Also
File Management Functions, GetFileAttributes