User Guide

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! Custom Action Name

Enter a unique name that begins with a letter or underscore. It can contain numbers

and periods. It must not match the name of any Windows Installer standard action.

See Standard Actions Reference in the Windows Installer SDK Help.

! DLL File

Specify a .DLL from your hard drive or local network to call during installation.

! Function Name

Type the name of the function within the .DLL file to call.

Also see:

Guidelines for Calling .DLLs on page 502

Guidelines for Custom Action Location on page 499

Using the Custom Action Properties Tab on page 534

Using the Custom Action Location Tab on page 532

Custom Action Type 1 in the Windows Installer SDK Help

Call DLL From Installed Files

This custom action calls a .DLL file that is installed by this installation. Use this if the

.DLL should remain on the destination computer after installation.

Tips

! You cannot send a variable parameter list to the .DLL. You can send only the handle

to the installation, which means the .DLL must be written specifically for Windows

Installer. To avoid these restrictions, use a “Call Custom DLL...” action instead.

! First add the file to be called to the Files page in Installation Expert.

! Shaded areas of MSI Script indicate restricted placement for this custom action;

because this custom action calls an installed file, it must run after files are installed.

Usage

Double-click the custom action and complete the Details tab: