Inno Setup Preprocessor: Directives Reference

There are two kinds of directives in ISPP: simple and inline.

Simple directives occupy a whole line and begin with the # symbol. For example the following defines a variable called MyAppName:

#define MyAppName "My Program"

Inline directives appear inside other lines and begin with {# and end with }. For example the following sets Inno Setup's AppName directive to the value of the previously defined variable:

[Setup]
AppName={#MyAppName}

As seen in the above example it is not necessary to specify the name of the emit directive when it is used inline, so {#MyAppName} is short for {#emit MyAppName}.

Directive syntax documenting conventions

Directive usage syntax uses the following conventions.

()	Group of tokens.
[]	Optional token or group of tokens.
|	Mutually exclusive tokens.
...	Previous token or group of tokens can be repeated.
token	Reserved word or symbol(s). Must be typed exactly as shown.
<token>	Non-terminal. Its syntax is either shown before, or explained.

Available directives

• #define
• #dim, #redim
• #undef
• #include
• #file
• #emit
• #expr
• #insert
• #append
• #if, #elif, #else, #endif
• #ifdef, #ifndef, #ifexist, #ifnexist
• #for
• #sub, #endsub
• #pragma
• #error