From: jim.peak@...
Date: 2005-10-18T21:26:57+09:00
Subject: Win32API and GetFileVersionInfo

Hi all,

I searched the whole web in order to find answers to my questions
without much success.

I'm writing a script that extract the version of executable files.  I
use the Win32API and the following functions:

GetFileVersionInfoSize
GetFileVersionInfo
VerQueryValue

in this order.  For GetFileVersionInfoSize and GettFileVersionInfo,
everything is working fine.  But I'm totally lost at using
VerQueryValue.

Here's what I'm doing:

apiGetInfoFromVersion = Win32API.new("version", "VerQueryValue",
['p','p','p','p'], 'v')
msgp = DL.malloc(DL.sizeof('P'))
infoBufferLength = DL.malloc(DL.sizeof('P'))
apiGetInfoFromVersion.call(infoVersion, "\\", msgp, infoBufferLength)


where infoVersion is the result of a previous call to
GetFileVersionInfo.

How do I retrieve the information in msgp? I've tried many ways,
without any success.
(Information about VerQueryValue:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/w
inui/windowsuserinterface/resources/versioninformation/versioninformationreference/versioninformationfunctions/verqueryvalue.asp
) 
 
Thank you in advance.