Select Assembly Library Window
When General > Prompt on Assembly Library inserts is selected in the Project properties, inserting a System file assembly into an Assembly Library file opens the Select Assembly Library window. This window lists all Assembly Library files for which you have write permissions. The default is the first one in the search order. If you have administrator privileges, < Create new file > is shown above the listed files. This command provides for creating a new Assembly Library file into which to insert the assembly.
To save the assembly to an existing file, you select the file and click OK.
If you are a system administrator or Project administrator, to save the assembly to a new file, you select < Create new file > , which is immediately replaced by < Type new file name here and press Enter > . You then enter the name for the new file in which to save this assembly and click OK.
As the assembly is pasted into the specified file, a window opens, indicating the progress. Once the paste process finishes, another window opens, indicating the file into which the assembly was inserted. You would click OK to close this window.