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DLL Talk / Return value (string) from dll

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Essence
21
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Joined: 12th Oct 2002
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Posted: 8th Dec 2004 05:06
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Is it possible to return a string instead of a integer ?
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Example:

Load dll "user32.dll",1
a$ = call dll 1,"GetVersion"
print a$

--------

How should i do this?
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empty
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Location: 3 boats down from the candy
Posted: 8th Dec 2004 22:55 Edited at: 8th Dec 2004 22:55
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Yes, it is possible to get a string from a DLL function- if that function actually returns a string... however, the GetVersion function doesn't return a string but a DWORD.

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wmf
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Posted: 9th Dec 2004 00:55
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the getversion() doesn't exist in user32.dll but it does in kernel32.dll. just use str$(dword) to print a string.
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empty
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Posted: 9th Dec 2004 01:19
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Indeed, but that's not exactly returning strings from a DLL, is it?

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Essence
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Posted: 9th Dec 2004 01:42
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That GetVersion() thing is just for example. I already knew that it wasnt in user32.

Can you give me a example with that DWORD thing? I have never worked with dword bevore

like this you mean?
----

load dll "kernel32.dll",1
global ret as dword

ret = call dll 1,"GetVersion"
r$=str$(ret)
print ret
----

should this work?
i cant test it now cuz im not at home.

thanks though for your support
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wmf
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Posted: 9th Dec 2004 03:58
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on my pc this prints;

a = 170393861
hex$(a) = A280105 (0A 28 01 05)

using the hex string this is what you do:

if the high bit in the high byte is 0 it's NT
the low byte (05) is major version 5
the next byte (01) is minor version 1
the two highest bytes (0A 28) = Build 2600 (- the highest bit if it is > 1)

all together - Windows NT 5.1 (Build 2600)
I don't know of any easier way. Maybe empty does.
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wmf
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Posted: 9th Dec 2004 04:02
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no edit option so here is a correction

the two highest bytes (0A 28) = Build 2600 (- the highest bit if it is > 0)
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empty
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Posted: 9th Dec 2004 07:27
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Quote: "should this work?
i cant test it now cuz im not at home."

Yes it will work but in that case "Print ret" and "Print r$" will print the same number.
What exactly are you trying to achieve?

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