How to check for registry value in Inno Setup?

How do I check for a registry value in Inno Setup.  I want to check if the "REG_DWORD" of Windows Vista is a 1 or a 0.

 if  "HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA" = 1 then begin
           Result := true;
end;
LVL 1
frankmorrisonAsked:
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mirtheilCommented:
Something like:

var
  EnableLUA: Cardinal;
begin
  if RegQueryDWordValue(HKEY_LOCAL_MACHINE, 'Software\Microsoft\Windows\CurrentVersion\Policies\System',
     'EnableLUA', EnableLUA) then
  begin
    // Successfully read the value
   if EnableLUA = 1then
    MsgBox('EnableLUA is 1',mbInformation, MB_OK);
  end;
end;
0

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