NULL, createMode, flags, NULL);
    Tcl_DStringFree(&ds);

    if (handle == INVALID_HANDLE_VALUE) {
	DWORD err;

	err = GetLastError();
	if ((err & 0xffffL) == ERROR_OPEN_FAILED) {
	if ((err & 0xFFFFL) == ERROR_OPEN_FAILED) {
	    err = (mode & O_CREAT) ? ERROR_FILE_EXISTS : ERROR_FILE_NOT_FOUND;
	}
	TclWinConvertError(err);
	return NULL;
    }

    /*

	/*
	 * Ignore matches on directories or data files, return if identified a
	 * known type.
	 */

	attr = GetFileAttributesW(nativeFullPath);
	if ((attr == 0xffffffff) || (attr & FILE_ATTRIBUTE_DIRECTORY)) {
	if ((attr == 0xFFFFFFFF) || (attr & FILE_ATTRIBUTE_DIRECTORY)) {
	    continue;
	}
	Tcl_DStringInit(&ds);
	strcpy(fullName, Tcl_WCharToUtfDString(nativeFullPath, -1, &ds));
	Tcl_DStringFree(&ds);

	ext = strrchr(fullName, '.');