WoWInterface - Clickthrough

You have to walk the frame hierarchy and set it for children (including un-named) of the frame that interests you.

I coded that part to help another author in locking/unlocking his frame and making it click-through.
This is the relevant part of the code:

Code:

local FrameCollection = {};

function GetChildrenTree(Frame) --- Walk the frame hierarchy recursively adding children.

                if Frame:GetChildren() then

                        for _,child in pairs({Frame:GetChildren()}) do

                                if child:IsMouseEnabled() then

                                        tinsert(FrameCollection,child);

                                end

                                GetChildrenTree(child);

                        end 

                end

        end

        GetChildrenTree(ParentFrame);

This is to get all children of the frame I want to make click-through and put them in a table.
Then later when actually toggling clickthrough on / off this code runs

Code:

-- check lock status and enable/disable mouse.

        if ParentFrame:IsVisible() then

                if Config.Locked then

                        ParentFrame:EnableMouse(false);

                        for _,childframe in pairs (FrameCollection) do

                                childframe:EnableMouse(false);

                        end

                else

                        ParentFrame:EnableMouse(true);

                        for _,childframe in pairs (FrameCollection) do

                                childframe:EnableMouse(true);

                        end                

                end

        end

Hope it helps.

Erm wait! (I just read the initial question)
You want to make the assist frame clickthrough??
Why on earth would you want to do that?
You might as well hide it / disable it completely then.. what good is an assist frame you can't use for "assisting"?