Easy porting question

[Lance Edmonds]

The default parameter passing method for C/C++ is BYVAL. If the C/C++ shows a pointer (ie, '*xyz'), then you either pass the variable BYREF (ie, 'BYREF xyz') or pass a pointer BYVAL (ie, 'BYVAL pXyz AS xyz PTR').

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Lance
PowerBASIC Support
mailto:[email protected][email protected]</A>

[Scott Turchin]

OK, but whY? Just curious......byval passes the value?

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Scott

[Michael Mattias]

In your BASIC DECLARE hWnd should be BYVAL

MCM

[Tom Hanlin]

wPsp AS WORD is most correct. In many cases, you may be able to use a LONG
instead, as a WORD will fit in a LONG, but this is not really wise.

lpPoint AS POINTAPI PTR

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Tom Hanlin
PowerBASIC Staff

[Scott Turchin]

And a follow up question as well:

Word wPSP

wPsp As Word? Or can I use wPsp as Long?


Also, pointer.......
lpPoint As LPPOINT

Is that correct? Is LPPOINT the C or C++ declare for a pointer? How do I modify that one?


Scott

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Scott

[Scott Turchin]

This is one of many exported routines from a EHLLAPI.DLL, I decided since I have some time to complete the porting over....
It's about 6 pages all told, one page left, the exported routines..

I'm assuming this:
typedef struct tagATMSystem {
    Word    wHLLAPIVersionNumber;
    Word    wHLLAPILevelNumber;
    }       ATMSYSTEM, NEAR * NPATMSYSTEM, FAR * LPATMSYSTEM;


'
'
Word WINAPI
HLL_AttachmateQuerySystem (
    HWND        hWnd,
    LPATMSYSTEM lpATMSystem);


Would come out as:
'
'
(I validated the TYPE structure in a previous post months ago)
Type ATMSystem
    wHLLAPIVersionNumber As Word
    wHLLAPILevelNumber As Word
End Type

'
'
Declare Function HLL_AttachmateQuerySystem LIB "EHLLAPI.DLL"(hWnd as long,lpATMSystem As ATMSYSTEM) As Long (Word?)

Scott




[This message has been edited by Scott Turchin (edited May 07, 2001).]