MAKEMSI quickly and reliably creates MSI files in a non-programmatic way\Source CodeCommandsProductFind

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The "ProductFind" Command

This command is used to find product(s) that match an "upgrade code" GUID. This is useful for detecting any prerequisite products that you might need installed (for launch conditions). It can also be used to prevent downgrades of your product.

The "Upgrade" table and the "FindRelatedProducts" action is used for the searching.

If you are validating that other products exist and you are packaging your own application you may want to think about the need for your application to do its own validations to ensure the required products haven't been uninstalled since the installation.

This command takes these parameters:

• UpgradeCode (required)
  This is the "UpgradeCode" GUID of product(s) you are interested in.

• Message (optional)
  If no products match your requirements then what message would you like to display when the install aborts? Note that the message can contain MSI formatting.

  You should pass "" if you don't want the install to abort.

• Property (optional)
  If you don't want to display a message you may wish to further process the results, in this case you will need to supply the name of a public property.

• Product (optional)
  This is only used if the default error message is displayed when no matching products were found. It should be a descriptive name for the product you were searching for.

• VersionMin (optional)
  This is the minimum version of a matching product (also see the "INCLUSIVE" parameter). If this parameter's value is blank (the default) then there is no mimimum and you have probably also specified blank for the "VersionMax" so that all versions of the product will match.

• VersionMax (optional)
  This is the maximum version of a matching product (also see the "INCLUSIVE" parameter). If this parameter's value is blank (the default) then there is no maximum and you have probably also specified blank for the "VersionMin" so that all versions of the product will match.

• Inclusive (optional)
  Pass Y/N for whether the range VersionMin-VersionMax is inclusive or not (the default is "Y").

• ValidateAfter (optional)
  The validation (if performed) is inserted into the "InstallUISequence" and "InstallExecuteSequence" tables. By default the check will be inserted after the standard "FindRelatedProducts" action, this parameter can be used to specify another action name.

EXAMPLE

Abort the installation if the required product is not already installed.

<$ProductFind UpgradeCode="{18346483-1764-4B87-ABC4-D48FFB73907E}" Product="Some Product">

For another example see the "prevent downgrades of your product" section.

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