XPRBexprSubtraction(XPRBvar, XPRBexpr) Operator

public static XPRBexpr operator -(
	XPRBvar lhs,
	XPRBexpr ex
)

Public Shared Operator - ( 
	lhs As XPRBvar,
	ex As XPRBexpr
) As XPRBexpr

XPRBvar var = new XPRBvar("Variable1");
XPRBvar var2 = new XPRBvar("Variable2");
XPRBexpr exp = new XPRBexpr(var + 3.6*var2);
XPRBexpr expnew;
...
expnew = var-exp;