INFO: Force the Display of a Migration DLL's Incompatible Message

• Microsoft Windows 2000
• Microsoft Windows 98
• Microsoft Windows 95

SUMMARY

A Windows 2000 Migration DLL displays messages in a user's Upgrade Report by writing to an [INCOMPATIBLE MESSAGES] section of its Migrate.inf file. However, these messages can be removed from the Upgrade Report by similar entries in the [HANDLED] section. This article describes how to force an incompatible message to display despite the conflict with the [HANDLED] section.

MORE INFORMATION

Typically, if you place a file, directory, or registry entry in the [HANDLED] section, Windows 2000 Setup assumes that you are going to fix any problems associated with that object. It uses this logic to ignore any entries in the [INCOMPATIBLE MESSAGES] section that are dependent on the same objects.

In some cases, the object being [HANDLED] also needs a message to be displayed in the Upgrade Report. For example, if your application did not have an equivalent Windows 2000 version, the Migration DLL may decide to remove the application completely. In this case, all directories and registry entries for the application should be placed in the [HANDLED] section, but you also want to warn the user that the application will be removed during the upgrade.

The solution involves modifying the condition that triggers the incompatible message in the [<Message Object Section>] of the Migrate.inf file. The three documented identifier types are "File," "Registry," and "Directory." A fourth option is to use the Migration DLL's ProductId as the Message Object and set it to "ProductId" as the Identifier Type. This will create a message that will always be displayed. This allows you to "handle" all files and registry entries associated with your product without suppressing the message in the Upgrade Report.

REFERENCES

For more information on Migration DLLs, see following in the MSDN Library:

Platform SDK; Management Services; Setup; Migration-Extension Interface

Additional query words:

Keywords : kbsetup kbWinOS2000 kbSDKPlatform kbMigWin9xtoWin2k kbMigrationDLL kbDSupport kbGrpDSTools kbMigrationDLLFAQ
Version : WINDOWS:95
Platform : WINDOWS
Issue type : kbinfo