[RESOLVED] Maths.

Hi Guys,

In VB6, the following code gives me the error "Method or data member not found"


Z = r1 * r2 * (pi / 2 + Math.asin(dFuelDepth / r2))

the highlighted item is asin

The error message appears immediately the sub containing the code is called. The sub is not even entered.

Any ideas please

Error is pretty self explanatory - asin function does not exist. There is a Sin instead.
What are you calculating, anyway? Don't you get dropdown list of available members of Math class when you type Math and a dot?

Hi,

I am calibrating a dipstick for an elliptical cross section oil tank.

The ASIN() function does NOT appear in the dropdown list after Math. but it is clearly documented in MSDN help.

I assume this is .Net so I moved it from the VB6 forum.

Hi

No, As I said in the first post, it is VB6. I am a little rusty in VB6 but am amending an old program.

Quote:

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Originally Posted by taxes

The ASIN() function does NOT appear in the dropdown list after Math. but it is clearly documented in MSDN help.

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As Martin correctly guessed ASin only exists in .Net but you posted in VB6 which is not the same as VB 2002-2008 (aka vb.net).
VB6 does not have that function.

in 2008 there is Math.Asin

Moved back to VB6.

Quote:

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Originally Posted by RhinoBull

As Martin correctly guessed ASin only exists in .Net but you posted in VB6 which is not the same as VB 2002-2008 (aka vb.net).
VB6 does not have that function.

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According to MSDN Library Visual Studio 6.0 the ASIN() function returns a numeric expression.

Again: VB6 does not offer that function.
If you reading MSDN then you must in the wrong secrtion - check Applies To if available or perhaps what language (you could be prompted to select one when you try to open specific tiopic).

Hi guys,

I have it now. I have to use Atn(x/Sqr(-x*x+1))


!!!!

Thanks everyone.

Right, but you could've at least admited that function you were refering to doesn't exist so other won't get confused. ;)

Regards.

Quote:

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Originally Posted by RhinoBull

Right, but you could've at least admited that function you were refering to doesn't exist so other won't get confused. ;)

Regards.

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OK.... WARNING TO ALL. The ASIN() Function) clearly detailed in MSDN Library Visual Studio 6.0 is NOT recognised by VB6. The ARCSIN can be replicated using the procedure detailed in MSDN Derived Maths Functions.

Happy? :wave:

Quote:

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Originally Posted by taxes

OK.... WARNING TO ALL. The ASIN() Function) clearly detailed in MSDN Library Visual Studio 6.0 is NOT recognised by VB6.

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That is because ASIN function is defined in C/C++/VC++, VFP and JScript (as far as MS concerns).
So, when browsing MSDN you have to pay attention to language function belongs in.

Quote:

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Originally Posted by RhinoBull

So, when browsing MSDN you have to pay attention to language function belongs in.

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Rhino, that my be the understatement of the year. I have been trapped ny MSDN numerous times, thinking that what is there will work with VB6. It tends to make me long for reference books that are gone forever. :sick:

Quote:

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Originally Posted by RhinoBull

That is because ASIN function is defined in C/C++/VC++, VFP and JScript (as far as MS concerns).
So, when browsing MSDN you have to pay attention to language function belongs in.

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Agreed. But my point is that, if you look up the ASIN() description in MSDN, it nowhere states that the function is limited to a specific language. So, being naieve, I assumed that it was available in VB6. Yes, if you look up Arcsine it makes it clear, but I first looked up Asin.

Anyway, my problem is solved and I have clarified it up as per your earlier post.

AGAIN, THANKS GUYS.