extract it as integer, then:
PHP Code:
octet[0] = (longip >> 24) & 0x000000FF;
octet[1] = (longip >> 16) & 0x000000FF;
octet[2] = (longip >> 8) & 0x000000FF;
octet[3] = longip & 0x000000FF;
FormatEx(NetIP, sizeof(NetIP), "%d.%d.%d.%d", octet[0], octet[1], octet[2], octet[3]);
it's not a char, it's array of bytes, or just int.