The IDE's hover help feature gives you the synopsis for a function while you're coding.
To use hover help, in the C/C++ editor, hold your pointer over a function. You'll see a text box showing the function's summary and synopsis information:
In addition, the Macro Expansion hover feature includes a toolbar at the bottom of the control with back, forward, and open declaration buttons. You can also drag the title bar for the Macro Expansion hover box.