Solved

VerFindFile and related

Posted on 2000-03-08
2
304 Views
Last Modified: 2010-04-04
Hi, I'm working on an ocx that checks for the version of another ocx and installs a newer version if necessary. It will be run on an NT network embedded in IE.
Can someone provide me with some example code for the GetFileVersionInfo, VerFindFile and VerInstallFile functions ?
0
Comment
Question by:DonBartholomew
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 

Accepted Solution

by:
Gurkan earned 100 total points
ID: 2595173
Hi,
This is the GetFileVersionInfo sample


function ReadVersionInfo(sProgram: string;
    Major, Minor, Release, Build : pWord): Boolean;
var
  Info:       PVSFixedFileInfo;
  InfoSize:   Cardinal;
  nHwnd:      DWORD;
  BufferSize: DWORD;
  Buffer:     Pointer;
begin
  Result:=False; //needed?
  BufferSize := GetFileVersionInfoSize(pchar(sProgram),nHWnd); {Get buffer size}
  if BufferSize <> 0 then begin {if zero, there is no version info}
    GetMem( Buffer, BufferSize); {allocate buffer memory}
    try
      if GetFileVersionInfo(PChar(sProgram),nHWnd,BufferSize,Buffer) then begin
        {got version info}
        if VerQueryValue(Buffer, '\', Pointer(Info), InfoSize) then begin
          {got root block version information}
          if Assigned(Major) then Major^ := HiWord(Info^.dwFileVersionMS);
          if Assigned(Minor) then Minor^ := LoWord(Info^.dwFileVersionMS);
          if Assigned(Release) then Release^ := HiWord(Info^.dwFileVersionLS);
          if Assigned(Build) then Build^ := LoWord(Info^.dwFileVersionLS);
          Result:=True;
          end;
        end;
    finally
      FreeMem(Buffer, BufferSize); {release buffer memory}
    end;
  end;
end;

USAGE:

procedure TForm2.Button1Click(Sender: TObject);
var
  major, minor, release, build:word;
begin
ReadVersionInfo(Edit1.Text,@major,@minor,@release,@build);
ShowMessage(Format('major: %d / minor: %d / release %d / build %d', [major,minor,release,build]));
end;

0
 
LVL 1

Author Comment

by:DonBartholomew
ID: 2599939
Thanks for this one. I'll give you half the points, since it's only one of the three functions in the question. It helped for another project, but for ocx's, I found out that if you make them 'signed', the webserver provides automatic installation and updates, without prompting the user.

Cheers, Bartman.
0

Featured Post

What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Have you ever had your Delphi form/application just hanging while waiting for data to load? This is the article to read if you want to learn some things about adding threads for data loading in the background. First, I'll setup a general applica…
Hello everybody This Article will show you how to validate number with TEdit control, What's the TEdit control? TEdit is a standard Windows edit control on a form, it allows to user to write, read and copy/paste single line of text. Usua…
In this video you will find out how to export Office 365 mailboxes using the built in eDiscovery tool. Bear in mind that although this method might be useful in some cases, using PST files as Office 365 backup is troublesome in a long run (more on t…
Visualize your data even better in Access queries. Given a date and a value, this lesson shows how to compare that value with the previous value, calculate the difference, and display a circle if the value is the same, an up triangle if it increased…
Suggested Courses
Course of the Month5 days, left to enroll

635 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question