MLEvaluate()

:Begin:
:Function: f
:Pattern: KernelTime[]
:Arguments: {}
:ArgumentTypes: Manual
:ReturnType: Manual
:End:

#include "mathlink.h"

/* read the Kernel's response to its evaluation of
   {Date[], $TimeZone} */

void f(void)
{
    if(! MLEvaluate(stdlink, "{Date[],$TimeZone}"))
        { /* unable to send the expression to stdlink */ }

    /* now read the Kernel's response */
    switch(MLGetType(stdlink))
    {
        /* ... */
    }

    /* ... */    
}