Hex to Decimal and Decimal to Hex?

[Ciralia]

Does Visual Basic have any built in formulas for converting a hex to decimal. For example, the user inputs FF82, and I want the decimal form of this hex string.

 

[DrJavaJoe]

MsgBox CLng("&H" + ("FF82&quot)

"Two strings walk into a bar. The first string says to the bartender: 'Bartender, I'll have a beer. u.5n$x5t?*&4ru!2[sACC~ErJ'. The second string says: 'Pardon my friend, he isn't NULL terminated'."

 

[mattKnight]

Hex$ will convert from dec to hex (obviously to string)

strHex = Hex$(16) 'strHex = "10"
[code]

and cint(&H10) will convert back

however
[code]
strHex = Hex$(16) 'strHex = "10"
debug.print cint(strhex) 'not desired result of 16 (prints 10)
strHex = "&H" & strHex 'Need to preend "&H"
debug.print cint(strhex) ' desired result of 16 
[code]

Take Care

Matt
If at first you don't succeed, skydiving is not for you.

 

[JeffTullin]

...and given the thread heading, this also:

Decimal to hex

msgbox Hex(56)

 

[Ciralia]

Thanks guys for the conversion formulas, they do work. But I have just one more question about conversion. Is there also a formula for converting negative numbers into hex? I tried using the normal Hex( ) formula for the number -1 and the result it gave me was a lot of FFFFFFF, when it should have just been FF. So somewhere, the function to convert was not converting it correctly.

 

[Digsy]

The answer you are getting is correct.

FF is normaly taken as being the Hex equivalent of 255 and not -1.

However if you want to 'bodge' your value of -1 to be FF in hex and -2 to be FE in hex etc. then you will need to use a bit mask on your answer.

Look at the difference between
msgbox Hex(-1)
msgbox Hex(-2)
and
msgbox Hex(-1 And &HFF)
msgbox Hex(-2 And &HFF)

Dave

 

[Ciralia]

Yes thank you that does work for the negatives. However, when I put in a mask of 8 hex characters &HFFFFFFFF, when I input the decimal number 10, I only get A as the hex result when it should be 0000000A. My value is stored as a string, so I'm not quite sure why the rest of the zeros aren't showing up.

 

[DrJavaJoe]

Try this:
Format(Hex$(10), "&0000000&&quot

"Two strings walk into a bar. The first string says to the bartender: 'Bartender, I'll have a beer. u.5n$x5t?*&4ru!2[sACC~ErJ'. The second string says: 'Pardon my friend, he isn't NULL terminated'."