Jay,

Those two slashes must be together, like '\\' and there should be not more than those two? If that is true, maybe you could do the work in KeyPress instead, something like

loForm			= Createobject('myForm')
loForm.Show(1)

define class myForm as Form
	add object myTextBox as Textbox

	procedure myTextBox.KeyPress(nKeyCode, nShiftAltCtrl)
	
		nodefault
		if nKeyCode # 92 or At('\', this.Value) = 0
			Dodefault(nKeyCode, nShiftAltCtrl)
			if nKeyCode = 92 and nShiftAltCtrl = 0
				Dodefault(nKeyCode, nShiftAltCtrl)
			endif
		endif
	
	endproc
	
enddefine

This way you are even saving keystrokes to the user <g> (Not completely sure if it is free of side efects)