I am sure I am saying this wrong, sorry about that. What I need to do is to make keyboard modifiers used by windows programs permanent until I turn them off (Win 7 ultimate x64). For example, in one GIS program I use Alt-Shift-right mouse click quite often to select objects in many layers in a drawing. When I just use the mouse button I select objects in one layer only. So if I want to repeatedly select objects in multiple layers I have to hold down Alt-Shift when I am using the mouse, which is a royal pain in the arse.
Sometimes I select some objects using the modifier, then click on another window in the program, click the mouse over a cell in a table, type some stuff in (in this window Alt-Shift has no effect on the mouse behavior), then back to the drawing to select something else, and NOT have to use Alt-Shift (but I want the mouse to function in the same manner). I want to use Alt-Shift-right click once, then turn off the key combination and just use the mouse to select until I press it again.
I don't think this is possible in native Win but there may be software out there that does this?