C/C++ Compiler (cl.hlp) (Table of Contents; Topic list)
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C4033
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     Compiler warning (level 1) C4033
 
     'function' must return a value
 
     The given function did not return a value.
 
     Only functions with a return type of void can use the return
     command without an accompanying return value.
 
     An undefined value will be returned when this function is called.
                                    -♦-