I have a leak in my inground pool. It is not the liner but one of the suction or discharge lines. There is no wet spots around the pool area. How do I search for this leak??

Extremely difficult. Typically they will do a smoke injection or sometimes a low level radioactive source. You could check with someone like American Leak Detection, they do this all the time

Only way I know that allows you to determine line wth issue is to isolate each line and pressure test each line. Here, lines would need to be isolated by a shutoff and then you need to cut in some kind of test setup that allows a pressure gauge and shrader valve to be installed and then you cap the lines at the pool and test each line until you find the one that loses pressure. Make sense?

Like Ma0641 said, it is not an easy thing to do, but it can be done!

Mark