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DarkBASIC Professional Discussion / Cant use a CALL DLL when calling functions

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MrTAToad
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Posted: 13th Nov 2002 00:17
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For example, you can't do :



Unfortunately.

The CALL DLL needs to be a seperate statement. I think the problem is due to the fact is that the CALL DLL doesn't know the value to return, in which case it would help if there was an automatic promotion to, say a default return of integers.
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The One Ring
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Posted: 13th Nov 2002 02:46
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It appears that DarkBasic Pro doesn't evaluate the CALL DLL function as an expression, perhaps (like in C++)?

In C++, if you use GetProcAddress, and you use a function pointer in an express, you do have to cast it... Don't suppose DBP supports casting?

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swdave
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Posted: 13th Nov 2002 03:07
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Try wrapping your call dll in a function.

putCharIntoBitmap(1,TITLE_BITMAP,32, _
PeekString(ptr), _
GAME_FONT)

function PeekString(ptr as integer)
Rtn = call dll (DLL_POINTER,"__peekString",ptr,4)
endfunction Rtn

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MrTAToad
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Posted: 13th Nov 2002 10:26
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DBPro doesn't support casting (unfortunatly - that can be very useful at times).

Certainly might be worth putting a wrapper around the dll

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ChipOne
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Posted: 13th Nov 2002 19:26
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well...some casting is supported:

print str$(21)
print val("19")
wait key

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IanM
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Posted: 13th Nov 2002 20:40
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That's 'overloading' ChipOne, not casting. Casting is conversion (automatic or not) between types - integer to float for example.

The command 'print' is actually several different commands. The one that is required is automatically selected according to the type of the argument following.

Back onto topic though - why not convert the dll to use the 3rd party command SDK and build it into the language.
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MrTAToad
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Posted: 13th Nov 2002 21:40
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I would if someone would give me the SDK...

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IanM
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Posted: 15th Nov 2002 01:24
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Sorry. I'm reliably informed that the SDK is available only for DBDN members at the moment - something I wasn't aware of when I mentioned it.
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MrTAToad
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Posted: 15th Nov 2002 01:50
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Any change of when us mere mortals will get it ?

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