how to change the source of PPT and update the links.

I have one PPT which is linked to excel for exa , if i one to make presentaion of feb'17 month so i want to update the link through Feb'16 master sheet and if i want to make the Presentaion of Mar'17  so i want to use Mar'17 master dump.

can you guys please help me to Provide VBA code that every time i select my excel path ( Master Excel sheet path from where all PPT i want to create ) so all PPT's get updated...

please help me out,