> In the math unit are the CompareValue functions only for signed integers. Why 
> not 
> for DWORD and QWORD?

I guess, that it's Delphi mimicing implementation (because it is Delphi-like).

And it can be tricky to distinguish signed and unsigned expression values.

Like, 

a: qword;
a-1 --- ??? (anyone may know for sure that a-1>0 and want to subtract one)

I guess it's something like that.
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