If not, you can select between each team member when you're on the map view by pressing Z, X, C on the keyboard. However, I haven't progressed any further than this. On the bottom right of the screen is the listing and corresponding key control of each man. If you wish to view a sniping position, select either Z, X or C and then press escape. You should now be in sniper mode, complete with unsteady gunsight aimed at the building.
Press escape to exit sniper mode.
Moving right makes him climb down, moving up stops him and also pulls him up. You're now on your own. Not even having progressed very far into the game, Hostage is neat. The graphics are first class, the gameplay is very smooth and quick and the opening music and in game sound effects are excellent. If anyone knows how to play the game to its conclusion or better still, has a copy of the manual in some downloadable form, I'd love to hear from you.