How to Read a SMS which from a special number in iOS via a PC program

I want to develop a PC program to help me handle some bank transfer requirements. For security reason, every requirements should provide a TAN-Code which will be sent via SMS. If the TAN-Code can be read by a program in PC, some special transfer requirements will be easy to handle. I know with a Android phone, that will not be a problem, but I'm not going to by one.