  This is a summary of a recursive construction of solutions of the
hbar-dependent KP hierarchy. We give recursion relations for the coefficients
X_n of an hbar-expansion of the operator X = X_0 + \hbar X_1 + \hbar^2 X_2 +
... for which the dressing operator W is expressed in the exponential form W =
\exp(X/\hbar). The asymptotic behaviours of (the logarithm of) the wave
function and the tau function are also considered.
