DLL’s implementing SAP Resource type in Windows Failover Cluster

Saprc.dll checks the color status of the SAP instance started with
sapstartsrv.exe. This may be a central instance (in 6.40 for example or
an  (A)SCS instance as of 7.00). But this can also be any other SAP
Instance started with sapstartsrv.exe (SAP MDM for example or SAP
Webdispatcher, if clustered). Starting / Stopping SAP Services during Failover:
what is an SAP Service, the instance or the Windows Service belonging to that instance?
The instance is started using resource DLL, the Windows Service of the instance
is started indirectly via the defined resource dependency.

Saprcex.dll is implementing the parameters (private properties) dialog for the SAP
Resource failover cluster resources.

If this DLL is missing, still able to administrate SAP Resources including the private properties.
They are then shown in a simple listbox – without SAP Logo on the page, showing
the private resource names instead of (localizable) Labels in front of Edit-Boxes.