PathFindOnFile() sample.

pfop_sample.c

/* cl pfop_sample.c shlwapi.lib */

#include <stdio.h>
#include <shlwapi.h>

int main()
{
  BOOL bOk;
  char buf[MAX_PATH] = {0};

  /* (A) Set path as relative filename */
  strcpy(buf, ".\\pfop_sample.exe");
  bOk = PathFindOnPath(buf, NULL);
  printf("(A) bOk=%s\n", bOk ? "TRUE" : "FALSE"); /* => bOk=FALSE */

  /* (B) Set separated path */
  strcpy(buf, "pfop_sample.exe");
  {
    const char *other_dirs[] = {".", NULL};
    bOk = PathFindOnPath(buf, other_dirs);
  }
  printf("(B) bOk=%s\n", bOk ? "TRUE" : "FALSE"); /* => bOk=TRUE */

  return 0;
}