Count number of bits set.
Source position: syshelph.inc line 1386
public function TInt64Helper.SetBitsCount: Byte;  | 
SetBitsCount returns the number of bits set in an Int64.
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Count number of set bits.  | 
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Set bit to 1.  | 
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Set bit to 0.  | 
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Invert bit.  | 
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Check bit.  | 
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Return the position of the leftmost bit set.  | 
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Return the position of the rightmost bit set.  | 
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Read or write a bit.  |