SHFileOperation and Null terminated strings

I am trying to use SHFileOperation to copy multiple files.  I am having difficulty constructing the pFrom string which requires the file names be seperated by a null character and if more than one file the whole string needs to be terminated with two null characters.  I originally did this program in Visual Basic 5 and it was real easy.  I need a stand-alone executable which is why I am learning Delphi.
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Create string pFrom like filename1+#0+filename2+#0+...+#0#0
rmbecAuthor Commented:
That is what I tried first.
When I do that filename2 does not get appended.
Are pFrom, filename1, etc all type string?
pFrom must be a string I mean
Become a CompTIA Certified Healthcare IT Tech

This course will help prep you to earn the CompTIA Healthcare IT Technician certification showing that you have the knowledge and skills needed to succeed in installing, managing, and troubleshooting IT systems in medical and clinical settings.

1. Place 2 TEdit's and a button in a form.
2. In Edit1 write the full path and file names of the file you want to copy, each is seperated by ';'.
3. In Edit2 write the destination Path/s, seperated by ';'.
4. Copy the code bellow and press the button.

uses ShellApi;

procedure TForm1.Button1Click(Sender: TObject);
  lpFile: TSHFileOpStruct;
  FFrom, FTo: string;
  pFrom, pTo: PChar;
  i: Integer;
  with lpFile do
    wFunc := FO_COPY;
    FFrom := Edit1.Text + #0#0;
    for i := 1 to Length(FFrom) do if FFrom[i] = ';' then FFrom[i] := #0;
    pFrom := PChar(FFrom);
    FTo   := edit2.text + #0#0;
    for i := 1 to Length(FTo) do if FTo[i] = ';' then FTo[i] := #0;
    pTo   := PChar(FTo);


Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
The last line should be SHFileOperation(lpFile);
rmbecAuthor Commented:
That won't work. As soon as I add the #0 to the null-terminated string it terminates the string.  The next strings do not get appended.  I've tried all sorts of ways to build this.  The closest I come is using an Character array but I need to dimension it after I calculate how many characters there are.
pFrom must be a string
rmbecAuthor Commented:
My apologies, your method does work. I don;t know what I did earlier to cause it not to work.  I am not working with edit boxes, nor do I have control over file names so I can't use the ';' character since it is allowed in a file name.  I use a '?' instead. I certainly learned alot about how Delphi handles strings, arrays, pointers and memory blocks during my journey here.  Thanks for your help.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.