awesome usage of function pointers in android C/C++

I have observed some awesome usage of function pointers in android C/C++. My sample application similar to that code:

#include <conio.h>

void fn( void (*seekDoneCb)() )
{
    void (*mSeekDoneCb)() = seekDoneCb;   

    (*mSeekDoneCb)();    
}

void Seek()
{
    printf("Seek()fn Called");
}

int main(int argc, _TCHAR* argv[])
{
    fn(Seek);
    getch();
    return 0;
}

Output:Seek()fn Called