Parameterizing Regions (images) under Stores in a function

Hello,

I am trying to parameterize regions (images) under Stores but it seems to not work. I tried with these 2 methods, 'Region.Check' and 'Region.Compare'. Here is what I have tried:

First workflow:

function ValidateRegion1(myRegion, transparentParam, mouseParam, pixelTolParam, colorTolParam, maskParam)
{
onscreenObj = myAppWindow;
Regions.myRegion.Check(onscreenObj, transparentParam, mouseParam, pixelTolParam, colorTolParam, maskParam);
}

Run: ValidateRegion1(myRegion1);

Result: It fails with error: "TypeError: region.Check is not a function"

Second workflow:

function ValidateRegion2(myRegion, transparentParam, mouseParam, pixelTolParam, colorTolParam, maskParam)
{
onscreenObj = myAppWindow.Picture();
Regions.Compare(myRegion, onscreenObj, transparentParam, mouseParam, pixelTolParam, colorTolParam, maskParam);
}

Run: ValidateRegion2(myRegion1);

Result: It fails with error: Cannot get a picture object from the input parameter. Although I passed the Picture method to my 'myAppWindow' object.

Is there a way to parameterize regions so that I can create and use a function for multiple region comparisons?

I found this link but here they are showing how to parameterize the 'onscreenObj' object but still hard-coding the region object. My onscreenObj object is going to be same but I have several regions to use for comparison, so I want to parameterize the region object.

https://support.smartbear.com/testcomplete/docs/testing-with/checkpoints/regions/parameterizing.html

Any help is appreciated. Thanks!