Solved

Registry

Posted on 2002-04-30
4
166 Views
Last Modified: 2010-04-04
How can i add a key such that it is listed after a numeral. Please see example.

If the programme sees that the string 'File1' is located in

Reg.RootKey:=HKEY_LOCAL_MACHINE;
Reg.OpenKey('SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon', False);

then it will write a string ('File2', 'Yes')


In general, If the programme sees that the string 'File[X]' is located in

Reg.RootKey:=HKEY_LOCAL_MACHINE;
Reg.OpenKey('SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon', False);

then it will write a string ('File[X+1]', 'Yes'). i wass check if the string 'File[X]' exists, if it does, then the programme will check for 'File[X+1]' to see if it has been created and will check until it finds File[Y]' that is not created and will proceed to write the data for it.
0
Comment
Question by:tyfing
4 Comments
 
LVL 5

Accepted Solution

by:
alanwhincup earned 50 total points
ID: 6981107
This should work:

uses
  ..., Registry, ...;

...

procedure TForm1.Button1Click(Sender: TObject);
var
  Reg : TRegistry;
  I : Integer;
begin
  I := 1;
  Reg := TRegistry.Create;
  try
    Reg.RootKey := HKEY_LOCAL_MACHINE;
    if Reg.OpenKey('SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon', False) then
    begin
      while Reg.ValueExists('File' + IntToStr(I)) do
        Inc(I);
      Reg.WriteString('File' + IntToStr(I), 'Yes');
    end
    else
      ShowMessage('Key not found.');
    Reg.CloseKey;
  finally
    Reg.Free;
  end;
end;

Cheers,

Alan
0
 

Author Comment

by:tyfing
ID: 6982450
what does
inc(I);
do ?
0
 
LVL 3

Expert Comment

by:hagur
ID: 6982526
inc is a function which increases a given variable by 1.

i := 1;

inc(i);

i is now 2.
0
 
LVL 6

Expert Comment

by:Stuart_Johnson
ID: 6982690
Inc has an overload as well which allows you to specify an integer to increment by.  For instance, to increase a value by 10, use:

 I := 1;
 inc(I, 10).  

now I = 11

Stu :)
0

Featured Post

Does Powershell have you tied up in knots?

Managing Active Directory does not always have to be complicated.  If you are spending more time trying instead of doing, then it's time to look at something else. For nearly 20 years, AD admins around the world have used one tool for day-to-day AD management: Hyena. Discover why

Question has a verified solution.

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

Creating an auto free TStringList The TStringList is a basic and frequently used object in Delphi. On many occasions, you may want to create a temporary list, process some items in the list and be done with the list. In such cases, you have to…
Introduction Raise your hands if you were as upset with FireMonkey as I was when I discovered that there was no TListview.  I use TListView in almost all of my applications I've written, and I was not going to compromise by resorting to TStringGrid…
Established in 1997, Technology Architects has become one of the most reputable technology solutions companies in the country. TA have been providing businesses with cost effective state-of-the-art solutions and unparalleled service that is designed…
With Secure Portal Encryption, the recipient is sent a link to their email address directing them to the email laundry delivery page. From there, the recipient will be required to enter a user name and password to enter the page. Once the recipient …

773 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