To specify an integer, you can either use a literal or you can use an
identifier previously defined with a #define directive. The latter
method is most useful for C and C++ developers, who can put all those
#defines in a header file and #include it in both the resource script
and their source code, guaranteeing that they use the same resource
identifiers everywhere. It's not so useful for us Delphi folk since the
resource compiler doesn't understand our const declarations.

When you load a resource, you can specify either a name or a numeric
index. (The resource-loading function can tell the difference since
PChars' addresses have nonzero values in their high-order words and
resource indices must be less than 65536.)

When you load a resource by name in Delphi, you'll wrap the name in
single quotes since that's what the Delphi syntax requires you to do. In
C++, you'd wrap the name in double quotes since that's how you make
strings in C++. The syntax of a resource script also uses double quotes
to indicate strings, but the syntax for the resource script is not
related in any way to how you access the resultant resource at run time.
(You don't "call" a resource.)