QR Code DLL API pointer and Power Builder

[Cigaras]

Hello, has anyone succeeded in using QRCode DLL API in PowerBuilder? I have PowerBuilder version 11.5, using WIndows 7 64bit, not sure how to define pointer variable, so my external funcion looks like this:

Function any QRCodeEncode2 (string dataToEncode, int versionRequested, int ecLevel) Library "MoroviaQRCodeFontEncoder5.dll"

and I get error "Unsuported argument type ...", I am pretty sure it is because of pointer variable, how do I define it in Power Builder?

[glitch]

Try declaring as

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FUNCTION ulong QRCodeEncode2(ref string dataToEncode, long versionRequested, long ecLevel) Library "MoroviaQRCodeFontEncoder5.dll"

I do not have PB so I can't verify if it is correct.

[Cigaras]

Encode function works, however when i pass ulong variable to QRCodeResultGetBarcodeString() power builder goes down, I don't even get an error message, it stops responding...

[glitch]

QRCodeResultGetBarcodeString requires memory preallocation. You might want to use QRCodeResultGetBarcodeString2 function instead.

The function prototype is like string QRCodeResultGetBarcodeString2(ulong, ref string). See

http://mdn.morovia.com/manuals/qrcode-f ... f8a709dcd2

[Cigaras]

Thank You, it works, however now I am not sure how to pass string to it to work properly, acording to manual dataToEncode variable is a pointer, so if I pass a regular string, I get some kind of chinese symbols as encoded mesage...

This is how my code looks:

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QRCodeResultGetBarcodeString2(QRCodeEncode2("test", 0, 0), ls_eol)

where ls_eol is also a regular string, equals char(13)+char(10)

[glitch]

Double check prototype declarations. Can you post them here?

We do not have PB in house so we can't reproduce the issue.

[Cigaras]

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Function ulong QRCodeEncode2 (string dataToEncode, int versionRequested, int ecLevel) Library "MoroviaQRCodeFontEncoder5.dll"
Function string QRCodeResultGetBarcodeString2 (ulong pEncodeResult, ref string eol) Library "MoroviaQRCodeFontEncoder5.dll"

[glitch]

How about

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Function ulong QRCodeEncode2 (ref string dataToEncode, int versionRequested, int ecLevel) Library "MoroviaQRCodeFontEncoder5.dll"

I believe that ref string is needed to pass a string literal.

[Cigaras]

Thets what i get:

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㡆䉂㡂う䙃䙁い㡆䉂㡂െ㉅䅁㉁ぅㅆㄷぁ㉅䅁㉁൅㡅㕁䘳㉁䅁㡅㠹㡁㌹䄲൅䄳㈲䄲あ㡄㝂㜲㍄䘳㑁െう䕅ぅう〳㠷㠹ㅁ䐲㉁ു㠸㠸㠸〸〸〸〰〸㠰〸8상邑֊缼ᡁ

using example shown above and using String variable to store "test" text, variable value doesn't change after executing the function...

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String ls_Code, ls_eol
ls_Code = as_Code
ls_eol = char(13)+char(10)
RETURN QRCodeResultGetBarcodeString2(QRCodeEncode2(ls_Code, al_Version, al_Level), ls_eol)

[glitch]

Note that if you are on Powerbuilder 10 and above, the string type is Unicode not the traditional single byte. Functions must be declared with 'ansi' on functions that accepts single-byte string. For example,

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Function string QRCodeResultGetBarcodeString2 (ulong, ref string)  &
library "MoroviaQRCodeFontEncoder5.dll" Alias For " QRCodeResultGetBarcodeString2;Ansi"