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VB6 And &&H Constants...


Can anyone explain what the difference between the following statements is:

Dim lValue As Long

lValue = 65536 And &HFF00
lValue = 65536 And &HFF00&


For the first statement, lValue = 65536
For the second statement, lValue = 0

If I do the following:

lValue = 65536 And &HFF0000

VB works correctly (lValue=1) and it won't let me add the extra & on the end.

Why do I need the extra & on the end on Hex numbers that end in 0?

Thanks,
Tim




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Hi to all..

I've been using API's for a while and I asked myself...

Why there are all those constants such as

Public Const GWL_WNDPROC = -4
Public Const WM_NULL = &H0

end very very very much more??

so I would know if anyone of you has a complete list of those constants..

I'm not asking the explanation for every constant this would be a hard mission.. but only the list with the values...

thanks
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Key Constants
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Constant Value Description
vbKeyCancel 3 CANCEL key
vbKeyClear 12 CLEAR key
vbKeyExecute 43 EXECUTE key
vbKeySnapshot 44 SNAPSHOT key


Any help would be greatly appreciated...Thank you!!!

Constants.
Ok, I am a newbie with visual basic and i have one question. what are constants? or i know what they are but,

Public Const HWND_TOPMOST = -1
Public Const SWP_NOMOVE = &H2
Public Const SWP_NOSIZE = &H1
Public Const HWND_NOTOPMOST = -2
Public Const LB_ITEMFROMPOINT = &H1A9

I dont know where comes these numbers: &H2, &H1, -2, -1, &H1A9

so can someone explain me what are those?

Hex Constants
Hi,
I am running into a strange problem with hex constants, here is some example code:

dim x as long

x=49333 ' I would not normally use decimal, but you see why I did it this way

select case x
case &hC0B5
' do something
case else:
' do something else
end select

It always takes the else path because &hC0B5 seems to evaluate to -16203. I want to throw something. You would think VB would be smart enough to evalute in the context of x (long)..... Can I force it to do that?

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Constants
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Constants And Their Uses?
Owch, may have realised that I have a lot of problems with Visual Basic by now, I thought I'd split the problems up so that if anyone has an idea about one thing but not another then it's easier for them. Sorry if that logic is skewed.

Anyway, constants are the problem here, so far I have got two sets :

'Window arrangement constants
'--------------------------------

Const vbCascade = 0
Const vbTileHorizontal = 1
Const vbTileVertical = 2
Const vbArrangeIcons = 3

'Cut/Copy Paste constants
'--------------------------------
Const COPY_TEXT = 0
Const CUT_TEXT = 1
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I need to use them under one menu (so for the window arrangements its mnuWindow_Action

How do I get it to arrange the windows by using those numbers?

Cheers again
RobC

API Constants
Hi,
Does anyone know where I could find a list of API constants? I'm trying to re-write some C++ code in VB and don't know the constants to some of the API calls. For example I don't know the value of the CREATE_ALWAYS constant in the API call:

hFile = CreateFile (szFileName,GENERIC_WRITE, FILE_SHARE_READ,&sa,CREATE_ALWAYS,FILE_ATTRIBUTE_NORMAL, NULL)

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Constants
Hi can anybody help please?

To make life easier, I am creating a small application which will basically tell me the structure of databases in SQL Server. When I read the values of the column type it brings them back as Long numbers. I know which constants represent which numbers i.e. adChar = 129 etc.

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Hi Folks,
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These are the AND, OR, etc operators.

I have the constants, COMMENTA, COMMENTB, and COMMENTC.


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What Are Constants
Hello,
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Please help me giving the answer
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Private Declare Function sndPlaySound Lib "winmm.dll" Alias "sndPlaySoundA" (ByVal lpszSoundName As String, ByVal uFlags As Long) As Long

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( email@removed )

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Thanks!



Edited by - wb6qdi on 2/8/2005 6:11:27 AM

VB6 And &&H Constants...
Can anyone explain what the difference between the following statements is:

Dim lValue As Long

lValue = 65536 And &HFF00
lValue = 65536 And &HFF00&


For the first statement, lValue = 65536
For the second statement, lValue = 0

Why do I need the extra & on the end on Hex numbers that end in 0?

Thanks,
Tim

Using API-constants
Hi,

When using APIs you often need to pass some constants into the APIs.

How do you know what value they have? Or is there another possibility to use them as to declare each constant by myself?

For example: If you want to use GetLocaleInfo, there are the constants

LOCALE_SYSTEM_DEFAULT, LOCALE_USER_DEFAULT, LOCALE_NEUTRAL ...

What do you pass into your function in your VB-code?

Thanks
Peter

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Guys, who knows the answer to this question:
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thanx

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I wish that one button change his colour forever (colours: red and green).
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How can I alternate red and green colour onto a graphical button?
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Please, can anyone help me?
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Could anyone please help before my brain melts?

Thanks in advance,
Dave

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Just out of curiosity...

Quote:





Originally Posted by VB Help for e.g. MouseMove event


You can identify individual keyboard modifiers by using the following constants:

Constant Value Description
fmShiftMask 1 Mask to detect SHIFT.
fmCtrlMask 2 Mask to detect CTRL.
fmAltMask 4 Mask to detect ALT.




Those constants don't seem to be exist in "my" VBA (Excel 2002/10/XP) - no matches in the object browser, "variable not defined" when used in code. Could people verify that in other copies and versions?

Thanks.

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i have placed around 1000 Constans in a notepad file.
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I'm making a program with several class modules. I have some constants that I want to use in functions in several of the modules. How can I do it so that I only write the constant once? It won't allow me to make the constant public.

thanks,
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I has wondering if somebody can help me. My brain was fried over the weekend and I was wondering if some one could help. I know this should be easy but I can't seem to get it. It C++ I have these:
#define _OSD_BASE0x9000
#define _OSD_YEAR4 _OSD_BASE+0
#define _OSD_YEAR2_OSD_BASE+1
#define _OSD_MONTH3_OSD_BASE+2
#define _OSD_MONTH2_OSD_BASE+3
#define _OSD_DAY_OSD_BASE+4
#define _OSD_WEEK3_OSD_BASE+5
#define_OSD_CWEEK1_OSD_BASE+6
#define_OSD_HOUR24_OSD_BASE+7
#define_OSD_HOUR12_OSD_BASE+8
#define_OSD_MINUTE_OSD_BASE+9
#define _OSD_SECOND_OSD_BASE+10

My question is how do I do these in VB?
Public Constant OSD_BASE = ????? .....

Thanks for the help!

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Const BLUE = 2
Const CHEESE = 2.5

Then I need to add these figures up in a label, like so:

frmFinished.lblTotal.Caption = FormatCurrency(TotalPrice)

However, the ENORMOUS and CHEESE constants always display as "2.00" instead of "2.50". Does anyone know why it keeps rounding my figures down?

Constants And References
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Example 1:
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Example 2:
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Keycode Constants
Anyone know where I can find a COMPLETE list of all keycode constants? The list in VB Help is a good reference but it does not have all of the keys.

TIA

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