c# - How can I receive OutputDebugString from service? -


i'm trying catch outputdebugstring messages (including services) using following code. worked fine until migrated windows 7. problem since windows vista services running in low level session #0 people says it's impossible catch them , is. think ? possible modify following code increasing rights able receive outputdebugstring messages session #0 ? in other words; possible share dbwin_buffer in session #0 session #1 ?

i should possible because e.g. debugview can , can't see service helper send messages (e.g. through named pipes) session #0 session #1, gui's running.

the problem imo in security settings. can suggest me how modify them ?

type   todsthread = class(tthread)   protected     procedure execute; override;   end;  ...  procedure todsthread.execute; var sharedmem: pointer;     sharedfile: thandle;     waitingresult: dword;     sharedmessage: string;     datareadyevent: thandle;     bufferreadyevent: thandle;     securityattributes: security_attributes;     securitydescriptor: security_descriptor;  begin   securityattributes.nlength := sizeof(security_attributes);   securityattributes.binherithandle := true;   securityattributes.lpsecuritydescriptor := @securitydescriptor;    if not initializesecuritydescriptor(@securitydescriptor, security_descriptor_revision)     exit;    if not setsecuritydescriptordacl(@securitydescriptor, true, nil, false)     exit;    bufferreadyevent := createevent(@securityattributes, false, true, 'dbwin_buffer_ready');    if bufferreadyevent = 0     exit;    datareadyevent := createevent(@securityattributes, false, false, 'dbwin_data_ready');    if datareadyevent = 0     exit;    sharedfile := createfilemapping(thandle(-1), @securityattributes, page_readwrite, 0, 4096, 'dbwin_buffer');    if sharedfile = 0     exit;    sharedmem := mapviewoffile(sharedfile, file_map_read, 0, 0, 512);    if not assigned(sharedmem)     exit;    while (not terminated) , (not application.terminated)     begin       setevent(bufferreadyevent);       waitingresult := waitforsingleobject(datareadyevent, infinite);        case waitingresult of         wait_timeout: continue;         wait_object_0:           begin             sharedmessage := string(pansichar(sharedmem) + sizeof(dword));             // here have need , process in main thread           end;         wait_failed: continue;      end;    end;     unmapviewoffile(sharedmem);    closehandle(sharedfile); end;

i've added c# tag if code in delphi because security attributes common whole windows api , c# has many followers :)

thanks suggestions

someone talked same issue in sysinternals forums. solution add "global\" named objects.

so use following

createevent(@securityattributes, false, true, 'global\dbwin_buffer_ready'); createevent(@securityattributes, false, false, 'global\dbwin_data_ready'); createfilemapping(thandle(-1), @securityattributes, page_readwrite, 0, 4096, 'global\dbwin_buffer');

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