Passing Parameters to a DLL File Function in a Custom Action

InstallShield 2022

Project:This information applies to the following project types:

•

Basic MSI

•

InstallScript MSI

There are a number of reasons why you might pass a parameter to a function in a custom action. For example, you might want to pass a URL for Web registration or the UserName property for a custom user interface. However, Windows Installer does not directly support passing parameters to DLL file functions.

The entry-point function for a Windows Installer DLL file can have only one argument, which is the handle to the database. To learn about a suggestion for passing parameters to a DLL file written for Windows Installer, see Calling Functions in Windows Installer DLL Files.

To accomplish this in InstallShield:

1.

In the Custom Wizard’s Action Type panel, select Call a function in a standard dynamic-link library.

2.

In the Function Definition panel, specify the parameters that you want InstallShield to pass to the function.