Find the GUID for SilverLight 4.0 (easy enough, if it is a MSI user Orca to
locate the ProductCode Property of the msi...
I am checking for MS Sync Framework 2.1 Synchronization, my check is
this(replace to suit SilverLight):
<util:ProductSearch
Guid ="A4E269C1-168D-40D3-9ABD-57FE4D4DB537"
Id ="SQLSyncx86Search"
Variable ="SQLSyncx86Installed"
Condition="$(var.Platform)=x86" />
<util:ProductSearch
Guid ="7AC8EF88-D996-4D47-B40C-4DD93E307481"
Id ="SQLSyncx64Search"
Variable ="SQLSyncx64Installed"
Condition="$(var.Platform)=x64" />
then my pre req check and install if not installed:
<MsiPackage Id="Synchronizationx86"
DisplayName="Microsoft Sync Framework 2.1 Redistributable
Package (Synchronization) x86"
DisplayInternalUI="no"
Visible="yes"
SourceFile="..\..\PreReqs\Synchronization-v2.1-x86-ENU.msi"
InstallCondition="NOT SQLSyncx86Installed AND
$(var.Platform)=x86"
Permanent="yes"/>
<MsiPackage Id="Synchronizationx64"
DisplayName="Microsoft Sync Framework 2.1 Redistributable
Package (Synchronization) x64"
DisplayInternalUI="no"
Visible="yes"
SourceFile="..\..\PreReqs\Synchronization-v2.1-x64-ENU.msi"
InstallCondition="NOT SQLSyncx64Installed AND
$(var.Platform)=x64"
Permanent="yes"/>
Hope this helped...
Steve
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