How to: Enable Just-In-Time Debugging for Windows Forms 

This topic applies to:

Visual Studio Edition	Visual Basic	C#	C++	J#
Express	No	No	No	No
Standard	Yes	Yes	Yes	Yes
Pro/Team	Yes	Yes	Yes	Yes

You can enable Just-In-Time debugging to launch the Visual Studio debugger automatically when a program, running outside Visual Studio, encounters a fatal error. Just-In-Time debugging is enabled in the Options dialog box.

Windows Forms applications require the following additional steps, because by default Windows Forms applications have a top-level exception handler that allows the program to continue running if it can recover.

Procedure

To enable Just-In-Time debugging of a Windows Form

1. Set the jitDebugging value in the machine.config or application.exe.config file, located in the system.windows.forms section to true. For example:

   <configuration>
       <system.windows.forms jitDebugging="true" />
   </configuration>
   

2. In addition, Windows Forms created with C++ must have the DebuggableAttribute set in a .config file or within their code. If you compile with /Zi and without /Og, the compiler sets this attribute for you. If you want to debug a nonoptimized release build, however, you must set this yourself by adding the following line to your application's AssemblyInfo.cpp file:

   [assembly:System::Diagnostics::DebuggableAttribute(true, true)]; 
   

   For more information, see DebuggableAttribute.

See Also

Reference

Just-In-Time, Debugging, Options Dialog Box

Concepts

Just-In-Time Debugging