test.c

#include <assert.h>
#include <stdio.h>
#include <Windows.h>

void __stdcall apc(ULONG_PTR context) {
  printf("APC jeuj\n");
}

int main() {
  HANDLE e; 
  
  e = CreateEvent(NULL, TRUE, TRUE, NULL);
  QueueUserAPC(apc, GetCurrentThread(), 42);
  WaitForSingleObjectEx(e, INFINITE, TRUE);

  printf("WaitForSingleObjectEx returned\n");

  return 0;
}