While in the Resource Symbols browser, you can edit or delete existing symbols that are not already assigned to a resource or object. You can change existing symbols that are in use in only one place by using the Change command to move to the appropriate resource’s property page or by moving to the property page directly. You cannot change read-only symbols.
A check mark in the In Use column of the Resource Symbols browser indicates that the symbol is being used. If Show read-only symbols is selected, read-only symbols are also displayed. Editable symbols are displayed as bold text, and read-only symbols are displayed as normal text. If a symbol is unassigned, “not used” appears in the Used by box when you select the symbol.
For more information on changing the name or value of a symbol already in use, see Changing a Symbol or Symbol Name.
To change an unassigned symbol using the Resource Symbols browser
To delete an unassigned symbol using the Resource Symbols browser
Note Before deleting an unused symbol in a resource file, make sure it is not used elsewhere in the program or by resource files included at compile time.