JK> enum Boolean {
JK>     False, True
JK> };
Check if your compiler hasn't a built-in type bool for this.
JK> class MouseInfo {
JK>     Boolean installed;
JK>     int buttons;
As I understand it, !installed is logically equivalent to buttons==-1.
If this is the case, I would erase "installed"; you could  replace  it
by a (inline) member function
Boolean Installed() const { return buttons!=-1; }
if necessary.
Thomas
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 þ MM 1.0 #0113 þ Drag me, drop me.  Treat me like an object!
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