Registry key?

[fidokomik]

I want to create autorun where I can to test if Adobe Acrobat is instaled in computer. How can I read the string from registry "default" value?
For example Acrobat 6.0 create this registry key:

REGEDIT4

[HKEY_CLASSES_ROOT\pdf_auto_file\shell\open\command]
@="\"C:\\Program Files\\Adobe\\Acrobat 5.0\\Reader\\AcroRd32.exe\" %1"

Is somewhere any sample how to test if exist the program in computer other then my program?

[Murariu Alexandru]

You read the default registry value by using an empty string as the ValueName parameter

procedure RunPdfFile; //Might not always work because the 'pdf_auto_file' string could be represented by another string
var S : string;
begin
{
You read the default registry value by using an empty string as the ValueName parameter
}
RegQueryStringValue(HKEY_CLASSES_ROOT, 'pdf_auto_file\shell\open\command', '', S);
S := Format(S, [RepConst('%SRCDIR%\file.pdf')]);
FileExec(S, False, True);
end;

procedure DetectAndRunPDF;
var S : string;
ERR : Integer;
begin
S := GetAssociatedProgram('PDF');
if not FileExists(S) then
begin
MessageBox('Acrobat Reader not installed!', 'Warning', MB_ICONWARNING);
Exit;
end;
ShellExec(RepConst('%SRCDIR%\readme.pdf'),'','',SW_SHOWNORMAL,ERR);
end;