Windows Installer Editor Reference
377
Merge Modules and Transforms
Non-nullable
Mark this if a value is required for this configuration item.
Default Value
Enter the value that should appear on the Merge Module dialog box when the
configurable merge module is added to an installation. This is the value that can
be changed.
3. Click OK.
Specifying Drop-Down List Values for Substitution
When you add a configuration item to a configurable merge module as a text drop-down
list, you must specify values and the text that describes them. When adding the merge
module to an installation, the installation author selects from a list that displays the
descriptive text. See Text Format Types in the Windows Installer SDK Help.
To specify drop-down list values for substitution
1. Access the Configuration Item Details dialog box from the Module Substitution
dialog box.
See
Creating a Configurable Merge Module
on page 374.
2. Complete the Configuration Item Details dialog box.
See
Setting Configuration Item Details
on page 375.
3. From Type, select Text Drop-down List.
4. Click Add.
The Drop-down List Value dialog box appears.
5. Complete the dialog box:
Name
Enter text to describe the substitution value. The installation author sees this
value in the Value drop-down list on the Merge Module Configuration dialog
box.
Value
Enter the value to be substituted for the current value of the configuration item.
6. Click OK.
The Configuration Item Details dialog box lists the text and value you defined.
7. Repeat the preceding three steps to add additional values.
8. Click OK.
The Module Substitution dialog box appears.
The values you defined for the configurable item appear in the Value field, and the
items appear in the Configuration Items list box.
9. Click OK.
Specifying a Bitfield for Substitution
When you add a configuration item to a configurable merge module as a bitfield drop-
down list, you must specify values and the text that describes them. When adding the
