Problem with registry key
lazarus / 34-Windows

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Roman · 2019-11-12 14:16

I would like to control with Lazarus the screen resolution. I tried
this code:

Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i  
reg:=Tregistry.Create(KEY_READ);  reg.RootKey:=HKEY_LOCAL_MACHINE; 
reg.OpenKeyReadOnly(key); 
If the key is

Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i
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][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i
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)

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Remy Lebeau · 2019-11-12 17:47

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.

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Roman · 2019-11-12 20:05

You are right, 5 - Access is denied. Running as administrator solves
problem. Thank you.