Subtracts one BCD number from another BCD number.
Function BcdSub(ByVal hDstBcd As Long, ByVal hSrcBcd As Long) As Long
The handle to the destination BCD number.
The handle to the source BCD number.
hBCD = CF1.AllocBcd
hBCD2 = CF1.AllocBcd
tmpLong = 6
tmpLong2 = 3
CF1.LongToBcd tmpLong, hBCD
CF1.LongToBcd tmpLong2, hBCD2
tmpVar = CF1.BcdSub(hBCD, hBCD2)
tmpVar2 = CF1.BcdToLong(hBCD)
If VarType(tmpVar) = vbLong And CLng(tmpVar2) = tmpLong - tmpLong2 Then
logWr "BcdSub OK"
logWr "BcdSub failed"
BcdSub subtracts the BCD number hSrcBcd from the BCD number hDstBcd, and places the result in the BCD number hDstBcd.
For convenience, the function also returns a handle to the BCD number hDstBcd. This is useful in situations where the result is used to call yet another function, as in the following example:
h = BcdSub(BcdSub(dst, src),src1)
h and dst are now the same handle, and that handle refers to a BCD number with the value: (dst - src) - src1.