Macro Structure:
- The main part of a macro starts with STARTMACRO and ends with ENDMACRO. Between them are the commands to run.
```
startmacro
  say "Hello World!"
endmacro
```
- The STARTMACRO line is also used to define any parameters that will be passed into the macro. They are always specified using type-colon-name (e.g. d:frequency for a parameter named frequency that is a double).
```
startmacro s:name
  say "Hello there ^{name}!"
endmacro
```
- User Macros can also include default values for the parameters given inside square brackets ([..]) after the parameter name.
```
startmacro s:name[Mickey]
  say "Hello there ^{name}!"
endmacro
```
- Comments can be included in a macro that do not affect its execution. A comment begins with an exclamation point (!) and ends at the end of a line. (Exclamation points inside quotes are part of the quote and not a comment.)
```
startmacro
  ! This is a comment
  say "Hello World!"  ! This is another comment
endmacro
```
- If a command is too long to fit on one line, it can be continued onto the next line by adding an ampersand (&) at the end of the line. The ampersand and any leading white space at the beginning of the next line are ignored.
```
startmacro
  say "Hello &
       World!"
endmacro
```

X-Midas Users Take Note:
X-Midas does not require `STARTMACRO` at the beginning of the macro. NeXtMidas enforces this rule and will give an exception if the `STARTMACRO` is missing.