Return the position of the leftmost bit set.
Source position: syshelph.inc line 1002
public function TWordHelper.HighestSetBitPos: Int8;  | 
HighestSetBitPos scans the word, starting at the leftmost position and working towards position 0, and returns the index of the first set bit. The position is measured from the 0-th, rightmost bit. When there are no bits set, the result is -1.
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Return the position of the leftmost set bit in an 8-bit value.  | 
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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 rightmost bit set.  | 
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Count number of bits set.  | 
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Read or write a bit.  |