Hi dave, b) is the answer. You can pass multiple Properties separated by semicola (or something else). In an Installscript CA you can use the Split-command to retrieve the separate values. See Macrovision Helpnet keyword "CustomActionData".
P.S. Somebody (I've forgotten who and where it was) has implemented a pattern in installscript by the which it is easy to store and retrieve Property-values in a CustomActionData.
And to avoid any confusion: each deferred custom action has its own instance of CustomActionData. But each custom action has only one, so if you want to pass multiple data to one A then you need to pack and split them as heiner_violet described.
Follow the link given by Stefan Krueger and unzip the file beneath "Decode the CustomActionData Property in InstallScript". This is an installscript sample to split a given CA Data.
And to avoid any confusion: each deferred custom action has its own instance of CustomActionData. But each custom action has only one, so if you want to pass multiple data to one A then you need to pack and split them as heiner_violet described.
Very helpful. The understanding is that, the third parameter in MsiGetProperty function is of type string, where in this case we get the biiiiiig string -> list of properties separated by semicolons. So, whatever the string maybe, we need to split it based on the delimiter.
