Is it able to setup a "data breakpoint" on return value

Question

The scenario is: there is a deep call hierarchy and each call will return HRESULT. If something bad happens, function will return S_FALSE or S_ERROR, and if a call return error, the caller will directly return the error code. normally all function will return S_OK. So when debug an issue, I need to do many trials, see which call returns !S_OK, and go deeper, and go on... until I found the ultimate place which cause a error.

I am wondering is it able to create a "data breakpoint" on return value (eax?) So when return value changed or return value equal to some value, the program can stop ...

Answer 1

Why not just assign the return value to a variable, set a break on the variable whenever it equals a certain value (this is known as a conditional breakpoint), and just return the variable instead of returning S_FALSE/S_ERROR/S_OK,etc.?

ex:

public long yourFunc() {
    long ret = S_OK;

    if (someCondition) {
        ret = S_ERROR;
    }
    return ret; // set a conditional breakpoint here, and put in
                // a condition where ret != S_OK
}

EDIT
If you don't want to/can't change the code, you may want to check out this thread: http://stackoverflow.com/questions/1378594/is-it-possible-to-set-a-conditional-breakpoint-at-the-end-of-a-function-based-on