We came across the requirement to capture All Values from an Input control so that a logic can be driven. Also, I came across few SAP forum questions.
Indeed it would be very difficult to capture all the values of Dimension and match it.
However, Combination of ReportFilterSummary() and pos() to capture the value as follows,
Pos(ReportFilterSummary(<Tab Name in double quotes>);<Input Control Value in double quotes>)
If the above results 0, we have selected ALL Values else we have chosen a specific value.
Please leave your comments, inputs on the above solution.