  Higher-order modes up to LP$_{33}$ are controllably excited in water-filled
kagom\'{e}- and bandgap-style hollow-core photonic crystal fibers (HC-PCF). A
spatial light modulator is used to create amplitude and phase distributions
that closely match those of the fiber modes, resulting in typical launch
efficiencies of 10-20% into the liquid-filled core. Modes, excited across the
visible wavelength range, closely resemble those observed in air-filled
kagom\'{e} HC-PCF and match numerical simulations. Mode indices are obtained by
launching plane-waves at specific angles onto the fiber input-face and
comparing the resulting intensity pattern to that of a particular mode. These
results provide a framework for spatially-resolved sensing in HC-PCF
microreactors and fiber-based optical manipulation.
