带有 WinDbg 和 DbgView 的 OutputDebugString

Question

With DebugView is simple: I clear its output window with "DBGVIEWCLEAR" (in OutputDebugString , ODS ), and then I show some 10 lines of info. I do this with a timer, 10 times per second.

But, while using WinDbg , DebugView doesn't get any output from ODS .

Q1: can WinDbg ignore / pass-through ODS , so that DebugView can catch it?

Or, maybe I could use WinDbg only: first, I'd have to setup .ocommand WINDBGCMD , then I could clear its output window with OutputDebugString("WINDBGCMD.cls;g"); ... but that fails with WinDbg telling me "Syntax error in '.cls;g'".

Strange, but if I use OutputDebugString("WINDBGCMD.echo\"Hello\";g"); that works just fine.

Q2: how to clear the output window of WinDbg (using ODS )?

Q3: finally, it would be better if I could use WM_COPYDATA with some external APP that would be able to clear its output window and show my 10 lines of info - is there such an APP? Maybe TraceTool , but that looks complicated. Also, it looks as it requires C++, not C.

Note: before ODS , I used to simply TextOut on the desktop. That worked just fine, but visually interfered.

Answer 1

I've solved my problem by using DebugView++

DebugView++ can receive debug string using SendMessage:

HWND debugviewpp = FindWindow(NULL, "[Capture Win32] - DebugView++");
SendMessage(debugviewpp, EM_REPLACESEL, GetCurrentProcessId(), (LPARAM) "Text 2 send");

Thus, WinDbg is out of the way.