This works for me.
from ctypes import *
import win32api
ImageSearchDLL = windll.LoadLibrary("ImageSearchDll")
ImageSearch = ImageSearchDLL.ImageSearch
imageFile = 'myImage.bmp'
searchReturn = c_char_p(ImageSearch(0,0,1024,1024,imageFile))
print search_return #shows c_char_p representation
print repr(string_at(search_return,21)) #shows string representation, need to fix the 21 to some sort of str_len function