### Start Debugging a DLL from the Session Control Window

You can use the Session Control window to access a Source window containing the source for a DLL you want to debug.

1. In the Session Control window, expand the Components Pane entry for the DLL you want to debug.
2. Continue expanding appropriate items in the list until you find the source file or function you want to debug. If the source file or function is not listed, you may not have compiled the function with debug information.
3. Double-click on the source file or function to raise a Source window for it.
4. Set a line, function, or other breakpoint at an appropriate point in that source window.
5. Run your program.

Debug a DLL
Run a Program
Set Breakpoints