Forum posts for rundll32.exe

Debugging a native dll using rundll32.exe , fail to load symbols

I'm writing a native dll that is due to run with rundll32.exe (that is obligated by our clients). I've using VS's debugging properties to define:

Command: c:windowssystem32 undll32.exe
Command Argument: $(TargetPath) , ENTRY_POINT


where ENTRY_POINT is an exported function of my dll, that obey the rundll32.exe interface.

This setup calls my function , but won't load any symbols and thus won't trigger any break point. I've learned that my function was called only after placing a call to MessageBox at its entrance.

when I use my own container application (just an exe calling Loadlibrary , GetProcAddress and the ENTRY_POINT function itself) all break points are triggered, and a step-by-step debugging is possible as usual.

what can cause that behavior?

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