2's Compliment - [RESOLVED]

I have the following problem which i know should be straight forward but i just cannot see the solution:

i have two 16bit words which i need to combine to get a 32bit signed long.

ie -123456 is stored as FFFE hex (MSW) and 1DC0 hex (LSW).

how do i get from the Hex values to the long value? (Code please)

VB Code:

msgbox hex(-12345)

Or did I mis-understand the question???

Somehow I don't think is Visual Basic.

I think in the C++ headers there is some code to convert from Hex to Long, and vice versa. Is this VB?


Phreak

Well, yes this IS VB, the other way around is DEC(hexnum)

Hex colors to long RGB colors?

VB Code:

Public Function HEXCOL2RGB(ByVal HexColor As String) As Long
 
 
Dim Red As String
Dim Green As String
Dim Blue As String
 
HexColor = Replace(HexColor, "#", "") 
    'Here HexColor = "00FF1F"
 
Red = Val("&H" & Mid(HexColor, 1, 2)) 
    'The red value is now the long version of "00"
 
Green = Val("&H" & Mid(HexColor, 3, 2))
    'The red value is now the long version of "FF"
 
Blue = Val("&H" & Mid(HexColor, 5, 2))
    'The red value is now the long version of "1F"
 
 
HEXCOL2RGB = RGB(Red, Green, Blue)
    'The output is an RGB value
 
End Function

NOTE: The return value of that function is a LONG value.

Phreak

Dont worry i have sorted it. I had a moment of insparation:

VB Code:

Dim Sample As Long
Dim Answer As Long
 
Sample = (MSW*65536)+LSW
 
If Sample>32768 Then
   Answer = ((65536-Sample)+1)*-1)
Else
  Answer = Sample
End If

*looks at his backup*

Ah, I had that in my backups. Not exactly the same though :p


Didn't quite understand what you wanted..

Nice..


Phreak