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Hi,



Is it possible to find out if an array has one, two, three etc dimensions ?



like arrtmp(0), arrtmp(0,1), arrtmp(1,1,1)



David


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"David DB" <er_fortsatt@hotmail.com>wrote in message

Check out the Ubound function in Help



--

Ken Halter - MS-MVP-VB - Please keep all discussions in the groups..

DLL Hell problems? Try ComGuard - www.vbsight.com/ComGuard.htm">www.vbsight.com/ComGuard.htm

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"David DB" <er_fortsatt@hotmail.com>wrote in message

Yes in VB6, you have to use CopyMemory. The array variable is a pointer to a

pointer to a SAFEARRAY structure.



Look in newsgroups for "vb SAFEARRAY dimensions"





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Hi Ken,



This only says how many rows there are in an column.



One of the most irritating thing about VB array is that they are in the form

of y,x insted of x,y thats normal. I cannot count the number of times I have

made a mistake there :-)



David



"Ken Halter" <Ken_Halter@Use_Sparingly_Hotmail.com>wrote in message



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"David DB" <er_fortsatt@hotmail.com>wrote in message



Just cycle through and capture the error when you go one too far.



As for what's "normal" that is a matter of debate. VB's array's are what

they are because they started out as full blown active objects. If you think

about how you might create such an object "on-the-fly" you will see VB's

presentation makes sense.



What you are calling 'normal' comes from C where arrays were not true

objects, but a statically defined contiguous memory blocks, who's size and

dimensions where known up front. It this case the "x,y" presentation makes

sense.



When C thru the STL offered true array objects, the older syntax was

maintain.



So what you call 'normal' might more properly called 'common'. <g>



-ralph





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From a previous post of mine...



The following function will tell you how many dimensions there are in the

array passed to it (using an error checking routine which preserves the

global error object).



Function GetArrayDimensions(AnArray As Variant) As Long

Dim Count As Long, X As Long

Dim ErrObj As Variant

If IsArray(AnArray) Then

With Err

'Store Global Err Object

ErrObj = Array(.Number, .Source, .Description, _

.HelpFile, .HelpContext)

On Error Resume Next

Do

Count = Count + 1

X = UBound(AnArray, Count)

If .Number Then

Exit Do

ElseIf X = -1 Then

Count = 1

Exit Do

End If

Loop

'Restore Global Err Object

.Raise ErrObj(0), ErrObj(1), ErrObj(2), ErrObj(3), ErrObj(4)

End With

End If

GetArrayDimensions = Count - 1

End Function



Note that if you pass it a non-array, it returns a value of -1; if you pass

it a Dynamic array that hasn't yet been dimensioned, it returns zero; and it

returns the number of dimensions in the array otherwise. If you Erase a

dynamic array, it will respond as if it hasn't been dimensioned yet; hence

this function would return zero. (There doesn't seem to be a way of

differentiating between an array that was never dimensioned and one that was

but was subsequently Erase'd.)



Rick





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I was thinking of normal Basic, Pascal etc convention.



I agree with you that it might make more sense, but human thinking is

normally x,y...



David



"Ralph" <nt_consulting64@yahoo.com>wrote in message



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BTW: trapping error conditions like that is a huge pain in the neck when

running in IDE and you want to debug code when error and not let your code

error handler take care of it...



David



"Ralph" <nt_consulting64@yahoo.com>wrote in message



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If it matters, this is by far the fastest way to get the number of array

dimensions:

www.devx.com/vb2themax/Tip/18265">www.devx.com/vb2themax/Tip/18265



RBS





"David DB" <er_fortsatt@hotmail.com>wrote in message

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"David DB" <er_fortsatt@hotmail.com>wrote in message

Only if you don't know the IDE. You have 3 options for how the IDE will

"handle" errors:



1. Break on all errors

2. Break on unhandled errors

3. Break in class module



Read up on these options. From what you stated above, it sounds like #1 is

the option you're looking for (with that setting, you'll enter into break

mode on every error, even if it would normally be handled by your error

handler routine).



Besides thoses, you can set break points and/or watchpoints (which you can

set to enter into break mode), change the current line to execute, step into

procedures, step over procedures, step out of procedures, etc.



One of VB's biggest strong points has ALWAYS been its debugging features.



--

Mike

Microsoft MVP Visual Basic



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vbnet.mvps.org/code/helpers/getarraydims.htm">vbnet.mvps.org/code/helpers/getarraydims.htm



--



Randy Birch

MS MVP Visual Basic

vbnet.mvps.org/">vbnet.mvps.org/



Please reply to the newsgroups so all can participate.









"David DB" <er_fortsatt@hotmail.com>wrote in message

Hi,



Is it possible to find out if an array has one, two, three etc dimensions ?



like arrtmp(0), arrtmp(0,1), arrtmp(1,1,1)



David





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