Search method of FarPoint Spread

It looks like foundRowID and foundColID are by-reference parameters, and JScript/JavaScript do not support passing parameters by reference.

A possible workaround is to install the https://support.smartbear.com/images/support/kb/data/2012/12/24/OutParameterWrapper.tcx extension and call the Search method using this extension. In this case you should be able to get the values of by-reference parameters. The code would be like this:

var params = [0, "300100", true, true, true, false, 3, 0, 0, 0]; // The last two 0's are foundRowID and foundColID
params = ConvertJScriptArray(params); // function code can be found at https://support.smartbear.com/viewarticle/42197/

var result = OutParameterWrapper.CallObjectMethod(bwSpread, "Search", params).toArray();
var foundRowID = result[8]; // 9th parameter of the Search method
var foundColID = result[9]; // 10th parameter of the Search method

I don't have any FarPoint Spread apps so I can't test this code, but I hope it gives you the idea.