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Author
Topic: Problem with registry key (Read 2169 times)
Roman
New Member
Posts: 24
Problem with registry key
«
on:
November 12, 2019, 03:16:11 pm »
I would like to control with Lazarus the screen resolution. I tried this code:
Code: Pascal
[Select]
[+]
[-]
reg
:
=
Tregistry
.
Create
(
KEY_READ
)
;
reg
.
RootKey
:
=
HKEY_LOCAL_MACHINE
;
reg
.
OpenKeyReadOnly
(
key
)
;
If the key is
Code: Pascal
[Select]
[+]
[-]
SYSTEM\CurrentControlSet\Control\GraphicsDrivers
the key is opened successfully and key names and key values are obtained correctly. But if I try the key
Code: Pascal
[Select]
[+]
[-]
SYSTEM\CurrentControlSet\Control\GraphicsDrivers\Configuration
(only 'Configuration' added) the OpenKeyReadOnly returns false. Putting backslash before 'SYSTEM' doesn’t help. What am I doing wrong? (W10, Lazarus 2.0.6)
«
Last Edit: November 12, 2019, 03:19:19 pm by Roman
»
Logged
Remy Lebeau
Hero Member
Posts: 1314
Re: Problem with registry key
«
Reply #1 on:
November 12, 2019, 06:47:59 pm »
TRegistry
has
LastError
and
LastErrorMsg
properties. What do they report when
OpenKeyReadOnly()
returns false? Chances are, either the key really does not exist, or you simply don't have permission to access it.
«
Last Edit: November 13, 2019, 01:44:04 am by Remy Lebeau
»
Logged
Remy Lebeau
Lebeau Software
- Owner, Developer
Internet Direct (Indy)
- Admin, Developer (
Support forum
)
Roman
New Member
Posts: 24
Re: Problem with registry key
«
Reply #2 on:
November 12, 2019, 09:05:37 pm »
You are right, 5 - Access is denied. Running as administrator solves problem. Thank you.
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