Q. How can i change the icon for my custom library?

Navigate to %AppData%MicrosoftWindowsLibraries.

Open the library whose icon you want to modify in a text or XML editor. (Notepad will do fine.)

Locate the line

true

Under this line, insert a new line and replace d:documentsiconsmsflag.ico with the name of your icon file. If you're using a DLL or EXE, also specific the index ID of the icon to be used. For example,

D:Documentsiconsmsflag.ico

Save the file.

Your complete file may look like this:

S-1-5-21-3859382301-3552666755-1537069426-1104
 4
 true
 D:Documentsiconsmsflag.ico
 
 \{7D49D726-3C21-4F05-99AA-FDC2C9474656\}
 
 
 
 
 
 
 true
 true
 
 D:Microsoft
 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
 
 
 
 Your library icon should now be the icon you specified.The default icons used are all found in c:windowssystem32imageres.dll and are icon numbers 1001 to 1008. If you are short of icons, take a look in this file with an icon browser and you may be able to use one!