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ReadBinaryData

Posted on 1998-11-04
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Last Modified: 2010-04-04
I need to know how to read from the Registry.  I got to read a binary text.

Please help!!!
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Question by:MichaelB99
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philipleighs earned 800 total points
ID: 1345678
var reg: TRegistry;
      Key: string;
      Value: string;
      Buffer: array [0..256] of byte;
begin
   Key := 'Your path';  // eg 'Software\Microsoft\Windows\'
   Value := 'The item to read';

  reg := TRegistry.Create;
  try
    if reg.OpenKey(Key) then
      begin
        reg.ReadBinaryData(Value, Buffer, SizeOf(Buffer));
        reg.CloseKey;
     end;
  finally
    reg.Free;
  end;


Sorry for any syntax errors, this is just from memory.
If the value doesn't exist, then an exception is raised.
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Expert Comment

by:philipleighs
ID: 1345679
Hi,

Just rereading your question, if it is a string that you want to read, replace reg.ReadBinaryData with reg.ReadString(Value);
This will return a string containing the data.
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Author Comment

by:MichaelB99
ID: 1345680
I am trying to read "ProxyEnable" from the internet settings.  The value reads "00 00 00 00" for false and "01 00 00 00" for true.  How would I be able to tell the difference?

The location is:
 
HKEY_CURRENT_USER
\Software\Microsoft\Windows\CurrentVersion\Internet Settings\

btw- you got to set Reg.RootKey := HKEY_CURRENT_USER
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Author Comment

by:MichaelB99
ID: 1345681
I am trying to read "ProxyEnable" from the internet settings.  The value reads "00 00 00 00" for false and "01 00 00 00" for true.  How would I be able to tell the difference?

The location is:
 
HKEY_CURRENT_USER
\Software\Microsoft\Windows\CurrentVersion\Internet Settings\

btw- you got to set Reg.RootKey := HKEY_CURRENT_USER
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LVL 3

Expert Comment

by:philipleighs
ID: 1345682
Make Buffer a DWORD,
compare it to $01000000 to see if it is true.

var Buffer: DWORD;

//do the stuff above
.

if Buffer = $01000000 then
   showmessage('proxy enabled')
else
   showmessage('proxy disabled');

You don't actually need to set RootKey to current user, when you create a TRegistry object, the default root is current user.
If you wanted local machine then you'd need to set it.

Cheers.

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