<p>How can I figure out, how many files needs to be recompiled <em>before</em> I start the build process.</p>

<p>Sometimes I don't remember how many basic header files I changed so a Rebuild All would be better than a simple build. There seams to be no option for this, but IMHO it must be possible (f.e. XCode give me this information).</p>

<p><strong>Update:</strong></p>

<p>My problem is not, that Visual Studio doesn't know what to compile. I need to know how much it <em>will</em> compile so that I can decide if I can make a quick test with my new code or if I should write more code till I start the "expensive" build process. Or if my boss ask "When can I have the new build?" the best answer is not "It is done when it is done!".</p>

<p>It's really helpful when the IDE can say <em>"compile 200 of 589 files"</em> instead of <em>"compile x,y, ..."</em></p>

If you try this, what happens?
```
```
print myresolver.query('sources.org', 'ANY', 'RRSIG')
```
```