Sourcesafe api (IVSSItem) in Delphi

Could some one tell me if it's possible/how to using to invoke the diff functionality in visual sourcesafe in delphi (version 4) ( preferably without usinf third party tools)?

Also how do i acess the version information/checking comments for an item please?

any sample source code would be appreciated

tks


KevinBadgerAsked:
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Wim ten BrinkConnect With a Mentor Self-employed developerCommented:
If I'm not mistaken, VSS has an automation interface. So all you would have to do is import this as a type library in your project and then check the functionality that it provides to you. Have you tried using that directly?
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KevinBadgerAuthor Commented:
i've tried importing SourceSafeTypeLib_TLB which is where i get IVSSItem from but it soen't seem to have  much functionality
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Wim ten BrinkConnect With a Mentor Self-employed developerCommented:
Well, if you have imported the type library then also look at http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnvss/html/vssauto.asp for more information.
A Google search for http://www.google.nl/search?hl=en&q=SourceSafeTypeLib&btnG=Google+Search is how I found that one, btw. :-)
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Eddie ShipmanConnect With a Mentor All-around developerCommented:
In order to check the DIFF on an item, do something like this:
(loose translation of some VBS code I have)

procedure VSSCheckin(AVSSIniFile, AFileName, AVSSItemPath, AVSSUserName, AVSSPassword: String;
                     ACheckinIfDiff: Boolean; ACheckInComment: String; AExclusive: Boolean = True);
var
  oVSSItem: IVSSItem;
  oVSSDatabase: IVSSDatabase;
  iFlags: Integer;
begin
  if AExclusive then
    iFlags := VSSCHECKOUT_EXCLUSIVE
  else
    iFlags := VSSCHECKOUT_SHARED;
  // Create the Database object
  oVSSDatabase := CreateOleObject('SourceSafe') as IVSSDatabase;
  try
    oVSSDatabase.Open(AVSSIniFile, AVSSUserName, AVSSPassword);
    oVSSItem := oVSSDatabase.VSSItem[AVSSItemPath, False];
    // Check it out
    oVSSItem.Checkout('Checked out by automated process', AFileName, iFlags);
    if (oVSSItem.IsDifferent[AFileName]) and (ACheckinIfDiff) then
    begin
      oVSSItem.Checkin(ACheckInComment, AFileName, iFlags);
    end
    oVSSDatabase.Close;
  finally
    oVSSDatabase := nil;
  end;
end;


I don't have the VSS TypeLib imported because I can't find it even though I have VSS Installed on
my system. Oh, wait, here it is... Let me double check that code before I finish this post...

Since I am going to begin working on a VSS project, I needed to know how to do that and I
posted code that works.
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Eddie ShipmanAll-around developerCommented:
If you need more, llike how to get the individual version comments, let me know.
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Eddie ShipmanAll-around developerCommented:
KevinBadger, have you tried any of our solutions?
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Eddie ShipmanAll-around developerCommented:
Wow, a 'B' for that, huh? You may need to be a little more careful about your grading in the future if you
want expert help.
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KevinBadgerAuthor Commented:
Sorry Eddie,
I didn't take time to read throught properly.
I was looking for a diff as in file comparison  (Sourcesafe "show differences") though. I suppose I could just launch the diff app if its available as aseperate executable
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Eddie ShipmanAll-around developerCommented:
It was not clear what you wanted to do. I do not know if showing the diff from the VSSItem woul duse the external diff util or not. I will test that and get back with you.
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Eddie ShipmanAll-around developerCommented:
From Alin Constantin at:
https://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=1057737&SiteID=1

...

IVSS is an automation interface, therefore there is no UI associated with it.

If you use VSS 6.0 IVSS API, there is an unsupported Diff-Merge OCX control
providing the diff-merge UI. It is included with the SourceSafe Automation
Sample written by Tim Winter. It's available at:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnvss/html/msdn_vssole.asp

If you use VSS 2005, the functionality of the unsupported control has been
replaced with command line invocation of SourceSafe Explorer. Syntax and
examples for Edit/View/Diff/Merge can be found at:
http://msdn2.microsoft.com/en-us/library/ms181130(VS.80).aspx
...


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