Creates a custom symbol with the specified name in the specified group.
[in] Custom symbol name. It should not contain groups or subgroups the symbol is located in.
[in] The group name a symbol is located in.
true – success, otherwise – false. To get information about the error, call the GetLastError() function.
The custom symbol name should be unique regardless of a group name it is created in.
The symbol and group names may only contain Latin letters without punctuation, spaces or special characters (may only contain ".", "_", "&" and "#"). It is not recommended to use characters <, >, :, ", /, |, ?, *.