The prepare command opens a license file. There are different commands
•Open a license file with user interface (PrepareAndCheck)
•Open a license file without a user PrepareAdvanced
•Open a file which ignores errors during open (PrepareForce).
•Open a file with Prepare or PrepareSimple (not recommended, only for older version)
Click on the sign on the left side to get all DLL commands related to Open a license file.