When you get your record expunged, it is as if the criminal charges against you are nonexistent. The records, including your arrest and prosecution, will no longer be available to the public but may be available to specific government officials as needed.
When you get your record expunged, you no longer need to admit to the conviction. It will be as if the conviction did not exist. However, DWI convictions in Texas are not eligible for expungement.