How to list or find Microsoft Hotfixes that are installed

These can all be run from the command line.  To send the results to a text file instead, at the end of each line include the following:  > drive\path\filename

To list all Microsoft Hotfixes that are installed:
wmic qfe get Hotfixid

To find a specific Microsoft Hotfix to see if it's installed:
wmic qfe | find "{KB#}"

To get a table list of hotfixes installed:
wmic qfe list brief

Examples:

wmic qfe | find "KB123456"
wmic qfe list brief > C:\Results\Hotfixes.txt