Debug a Windows CE setup DLL

::GetModuleFileName(g_hInstDLL, szName, nSize);
::MessageBox(hwndParent, szName, _T(""), MB_OK);

where g_hInstDLL is the handle to the loaded module, usually available in the DLL entry point:

BOOL APIENTRY DllMain(HANDLE hModule, DWORD ul_reason_for_call, LPVOID lpReserved)
{
switch (ul_reason_for_call)
{
case DLL_PROCESS_ATTACH:
case DLL_THREAD_ATTACH:
case DLL_THREAD_DETACH:
case DLL_PROCESS_DETACH:
//assign the handle here
g_hInstDLL = (HINSTANCE)hModule;
break;
}
return TRUE;
}

Change the setup DLL project properties-> Configuration Properties->Linker -> General -> Output File. Change the existing value to $(OutDir)/STPXXXX.dll where STXXXX.dll is the filename found in step 3 and rebuild the DLL.

Go to Tools -> Attach To Process, select device or emulator and attach to process tmarshaller.exe

Breakpoint should now be hit and debugging can be done.

After debugging, remember to change the linker output file name back to how it was (e.g. $(OutDir)/Setup.dll )

Reference:

http://social.msdn.microsoft.com/Forums/en-US/vssmartdevicesnative/thread/03b20581-1479-44aa-ba9d-caf1c313c4eb