dynamicmodule with f[x_] possible?

*To*: mathgroup at smc.vnet.net*Subject*: [mg104470] dynamicmodule with f[x_] possible?*From*: matthew kooshad <matthewkooshad at gmail.com>*Date*: Sun, 1 Nov 2009 04:01:27 -0500 (EST)

hello, i would like to make f[x_] dynamic and based on input. i've tried changing "a = 0" for example to f[_x] = 0 and replacing all other "a" with f[x], but no luck there. will someone please guide me on this? thank you :) DynamicModule[{a = 0, b = 0}, Deploy[Style[ Panel[Grid[ Transpose[{{Style["a", Red], Style["b", Red], "sum", "diff", "product"}, {InputField[Dynamic[a]], InputField[Dynamic[b]], InputField[Dynamic[a + b], Enabled -> False], InputField[Dynamic[a - b], Enabled -> False], InputField[Dynamic[ab], Enabled -> False]}}], Alignment -> Right], ImageMargins -> 10], DefaultOptions -> {InputField -> {ContinuousAction -> True, FieldSize -> {{5, 30}, {1, Infinity}}}}]]]