Board index » delphi » Windows Registry

Rafael Guimaraes

Delphi Developer
Wed, 18 Jun 1902 08:00:00 GMT

Windows Registry

Hi Folks,

I am trying to read and write some values in the Windows Registry, but I
just can't!
Whenever I try to open the key HKEY_LOCAL_MACHINE I get an Access Violation
message... But, if I open the HKEY_USERS it doesn't happen... What should I
do to read a value in the following key: \HKEY_LOCAL_MACHINE\SAGN\URL
the name of the key is CadConta (I have created it with RegEdit)... I've
tried to use the following code but I allway got that Acess Violation
Message...

procedure TCadCliente.ReadRegistryValues (FileName : String);
var Reg : TRegistry;
    URL_CadConta : String;
begin
  Reg.Create;
  Reg.OpenKey('HKEY_USERS/SAGN/URL',True)
  URL_CadConta := Reg.ReadString('CadConta');
  Reg.CloseKey;
  Reg.Free;
end;

What should I do about that???????

                                     []s Rafael Guimaraes

 
Nick Ro

Delphi Developer
Wed, 18 Jun 1902 08:00:00 GMT

Re:Windows Registry


You can not call a method of a Object that does not exist yet.

USE

   Reg := TRegistry.Create

NOT

   Reg.Create

On 28 Aug 1997 23:01:35 GMT, "Rafael Guimaraes"

Quote
<rgu...@redegazeta.com.br> wrote:
>Hi Folks,

>I am trying to read and write some values in the Windows Registry, but I
>just can't!
>Whenever I try to open the key HKEY_LOCAL_MACHINE I get an Access Violation
>message... But, if I open the HKEY_USERS it doesn't happen... What should I
>do to read a value in the following key: \HKEY_LOCAL_MACHINE\SAGN\URL
>the name of the key is CadConta (I have created it with RegEdit)... I've
>tried to use the following code but I allway got that Acess Violation
>Message...

>procedure TCadCliente.ReadRegistryValues (FileName : String);
>var Reg : TRegistry;
>    URL_CadConta : String;
>begin
>  Reg.Create;
>  Reg.OpenKey('HKEY_USERS/SAGN/URL',True)
>  URL_CadConta := Reg.ReadString('CadConta');
>  Reg.CloseKey;
>  Reg.Free;
>end;

>What should I do about that???????

>                                     []s Rafael Guimaraes

-----------------------------
Nick Roux
Johannesburg, South Africa
Mailto:Roux_N...@Lilly.Com
-----------------------------
Daniel Silverston

Delphi Developer
Wed, 18 Jun 1902 08:00:00 GMT

Re:Windows Registry


In article <01bcb406$d6c269c0$5b0ef...@pc3-vix.vix.nutecnet.com.br>
           rgu...@redegazeta.com.br "Rafael Guimaraes" writes:

Use TRegistry.Root, set to HKEY_USERS (No Quotes) then
open the key 'SAGN\URL' and readstring 'CadConta'

Quote
> Hi Folks,

> I am trying to read and write some values in the Windows Registry, but I
> just can't!
> Whenever I try to open the key HKEY_LOCAL_MACHINE I get an Access Violation
> message... But, if I open the HKEY_USERS it doesn't happen... What should I
> do to read a value in the following key: \HKEY_LOCAL_MACHINE\SAGN\URL
> the name of the key is CadConta (I have created it with RegEdit)... I've
> tried to use the following code but I allway got that Acess Violation
> Message...

> procedure TCadCliente.ReadRegistryValues (FileName : String);
> var Reg : TRegistry;
>     URL_CadConta : String;
> begin
>   Reg.Create;
>   Reg.OpenKey('HKEY_USERS/SAGN/URL',True)
>   URL_CadConta := Reg.ReadString('CadConta');
>   Reg.CloseKey;
>   Reg.Free;
> end;

> What should I do about that???????

>                                      []s Rafael Guimaraes

--
Daniel Silverstone (Usually ;)

Look at the farstar Homepages on:
 http://www.farstar.demon.co.uk/

Try out Daniel's TPascal Page & Delphi 2.0 bits at
 http://www.farstar.demon.co.uk/Pascal/index.htm

Mail me & give comments (I know it's sparse ;)
 mailto:WebMas...@farstar.demon.co.uk

Rene Veerm

Delphi Developer
Wed, 18 Jun 1902 08:00:00 GMT

Re:Windows Registry


On 28 Aug 1997 23:01:35 GMT, "Rafael Guimaraes"

Quote
<rgu...@redegazeta.com.br> wrote:
>Hi Folks,

>I am trying to read and write some values in the Windows Registry, but I
>just can't!
>Whenever I try to open the key HKEY_LOCAL_MACHINE I get an Access Violation
>message... But, if I open the HKEY_USERS it doesn't happen... What should I
>do to read a value in the following key: \HKEY_LOCAL_MACHINE\SAGN\URL
>the name of the key is CadConta (I have created it with RegEdit)... I've
>tried to use the following code but I allway got that Acess Violation
>Message...

>procedure TCadCliente.ReadRegistryValues (FileName : String);
>var Reg : TRegistry;
>    URL_CadConta : String;
>begin
>  Reg.Create;
>  Reg.OpenKey('HKEY_USERS/SAGN/URL',True)
>  URL_CadConta := Reg.ReadString('CadConta');
>  Reg.CloseKey;
>  Reg.Free;
>end;

procedure blah;
var
  reg : tregistry;
begin
  reg:=tRegistry.create;
  reg.rootkey:=HKEY_LOCAL_MACHINE; //or any of the other root-keys you
see when you load up regedit
  if reg.openkey ('SAGN/URL',false) then begin
  //key exists, read value
    url_cadconta=reg.readstring ('cadconta');
  end else begin
  //key does NOT exist, time for error handling here.
  end;
  reg.free;
end;

Other Threads

1. read and write the windows registry file from pascal in

2. Modifying the Windows registry.

3. Windows Registry

4. Windows Registry Changes

5. Windows registry...

6. Windows registry database

7. Windows Registry

8. File Types in the Windows Registry

9. windows registry

10. Windows registry