Ann,
Depending on your display adaptor, you miht be able to change the screen resolution. Right-click on an empty area of the desktop, and choose "Display Properties" or similar (the wording may be different depending on the actual drivers you use). You may be able to change the resolution to higher than X x 768 - try experimenting.
If the resolution won't go any higher you can auto-hide the taskbar - right-click the taskbar, choose Properties, then, on the Taskbar tab, check "Auto-hide the taskbar". The game will still not quite fit as the edges of the program make it slightly larger than 1024 x 768.
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To err is human; to arr is pirate.