<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _windowsLdmodSources(target, source, env, for_signature):
 """Get sources for loadable modules."""

    return _dllSources(target, source, env, for_signature, 'LDMODULE')