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copied!<p>You could just call <strong>DebugBreak()</strong> from within your program.</p> <p>According to the <a href="http://msdn.microsoft.com/en-us/library/ms679297(VS.85).aspx" rel="nofollow noreferrer">MSDN page</a>, DebugBreak does the following:</p> <blockquote> <p>Causes a breakpoint exception to occur in the current process. This allows the calling thread to signal the debugger to handle the exception.</p> <p>To cause a breakpoint exception in another process, use the DebugBreakProcess function.</p> </blockquote> <p>You can then attach your debugger at this point, and continue running the program.</p> <p>The only problem with this solution is that you need to make the DebugBreak() in the code conditional, so that it won't break <em>every</em> time the program is run. Maybe you achieve this through an environment variable, registry setting, or a parameter which the scheduler passes in to the program to ensure that it breaks when it starts up.</p> <h3>Example code</h3> <p>Here's some untested example code reading an environment variable:</p> <pre><code>int main() { char *debugBreakChar = getenv("DEBUG_BREAK"); int debugBreak = atoi(debugBreakChar); if (debugBreak) { DebugBreak(); } // Rest of the program follows here } </code></pre> <p>Now all you need to do is set the environment variable as a system variable, and ensure that it's accessible from the same shell context as the scheduler (rebooting will achieve this):</p> <pre><code>set DEBUG_BREAK=1 </code></pre> <p>Now the program will break on startup, allowing you to attach a debugger. Changing the environment variable to 0, or un-setting it, will allow the program to run normally.</p> <p>Environment variables are a bit fiddly in this regard, as they are context-based and you need to know that the scheduler runs from the same environmental context. Registry values are better than this, and you can read a registry value using <a href="http://msdn.microsoft.com/en-us/library/ms724911(VS.85).aspx" rel="nofollow noreferrer">RegQueryValueEx</a> in your code instead (you'll need to include windows.h to use this function).</p>

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