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copied!<ul> <li>Since it was hitting the deadline there was no time to wrap C++ with managed code as suggested by Wilbert. </li> <li>Running the two programs on separate VS also doesn't work ( confirmed by trying out ) since program <strong>B</strong> is run only when necessary by the program <strong>A</strong> and each time <strong>command line arguments</strong> for starting <strong>B</strong> were different and <strong>generated at run-time</strong>. ( cannot be done even in same VS since debugging one process seems to pause execution of the other process )</li> <li>Calling Debug in the program is not possible since <strong>B</strong> is a native C++ application. To access visual studio extensions, the project needs to be a managed project. Converting the current project to managed was not possible due to a problem with my version of VS. ( after installing Net Framework 4.5, VS 2010 needs to be updated to SP1 to be able to work use some features )</li> </ul> <p>Applied Solution:<br/></p> <ol> <li><p>In source of <strong>A</strong> , put a break-point below the place where command line arguments are generated for <strong>B</strong> (I put it at where <code>proc.Start()</code> is called).<br/> e.g.</p> <pre><code>Process otherProcess = new Process(); ... otherProcess.StartInfo.Arguments = "abc" + foo() + "," + bar();// what we need ... otherProcess.Start(); // break-point is here </code></pre></li> <li><p>Run <strong>A</strong> in debug mode until the break-point is reached.</p></li> <li>Read the value of <code>proc.StartInfo.Arguments</code> and copy the value for later usage.</li> <li>Safely exit debugging <strong>A</strong> (stop debugging).</li> <li>Set command line arguments of <strong>B</strong> as the copied values (Project Properties > Debugging > Command Line Arguments)</li> <li>Start debugging <strong>B</strong> (right click on project > debug > start a new instance).</li> </ol>

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