This seems just to simple, maybe I didn't understand, correct me if I make a mistake but what you need to do to pass parameters to a menu is as simple as this

xParameter1="Whatever"
xParameter2=Thisform

do MyMenu.mpr with xParameter1,xParameter2 && or =MyMenu(xParameter1,xParameter2)

*:In MyMenu.mpr
LPARAMETERS xString, oObject

is it that what you where asking?