VBA (Keyboard Strokes)

I've programmed in many different forms of BASIC in my days, but I'm having too much trouble with VBA, and can't figure out if it's me or if it's the version of Excel I'm using (2002). I wrote a program in Excel, where if certain cells contain values other cell's calculations will become active. I want to click on a button that I created on the spreadsheet, then be able to select different keyboard strokes to activate these cells. I understand that there are 3 event codes that circle around this concept and that is KeyDown, KeyUp and KeyPress. Whenever I type in what MS Help told me to type in for these events, it always returns a runtime error.