title: How to use "MSHookFunction" in theos?
body: <p>Thank Dustin L. Howett for great theos first.
  But I have to hook some C functions, so I must use MSHookFunction.
  However it seems that logos doesn't support hooking C functions.
  So I write "MSHookFunction(func1,replaced_func1,&amp;original_func1);" in  "%ctor" block in some.xm file.</p>
  
  <p>Compile it.</p>
  
  <p>"error: invalid conversion from ‘objc_class* (<em>)(NSString</em>, NSString*)’ to ‘void*’ initializing argument 1 of ‘void MSHookFunction(void*, void*, void**)’"</p>
  
  <p>So what can I do to fix this with theos?</p>