How to use SuiteCRM developer guide? Need a brief explaination
Hi and welcome!
the dev guide is a good start - but you will need additional resources like this community board, stackoverflow and such.
If you have any specific questions, try to find older threads or ask yourself 
I am new to SuiteCRM. I want to use SuiteCRM API for getting data entered by user into my custom module. Developer guide does not mention file names for making modifications. Only a piece of code is shown. But in which file I should enter that code and make the modifications ? How this can be identified?
Hi,
if you really want to add your own, custom api-method, the rest4-tutorial can be found here at the bottom:
But: if you just want to do crud-operations (create/update/delete) for (custom) modules/fields: that is already possible without any modifications, the API can handle them directly.