Can a hotkey be set to do the 'hide' button in the launcher with mm in frodo?

My dodgy touchscreen has problems with the screen edges, so I either need a hotkey or some app to press it when another part of the screen (or key) is pressed.

(girder with mouse events?)

All other apps I have re-skinned to keep the buttons from the edges but this is the last one I need a mouse for.