Functions

InstallShield 2020 » InstallScript Language Reference

A function is a named set of instructions that operate together to perform a specific task.

Function Characteristics

Every function has the following characteristics:

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A function is named. Each function has a unique name. When you call the function by name, you know which set of instructions will run, and you can be sure of consistent results. You can also call a function from within another function.

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A function is independent. In most cases, any function can perform its instructions without interfering with other parts of the program.

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A function performs a certain task. A task is any single job that the script must perform, such as displaying a bitmap, compressing a file, or creating a folder.

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A function can return a value to the script. When the script executes, it performs the instructions of the function. Based on the result of the instructions, a function can return information to the script.

Function Types

InstallShield allows you to use three types of functions in your setup script:

Function Types

Function Type	Description
Built-in functions	Functions supplied by InstallShield or included for Sd dialogs.
User-defined functions	Functions that you create.
DLL-called functions	Functions that you can call in a DLL.

Note:Like the C programming language, InstallScript does not support nested function blocks.

See Also

Building Functions