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#1 Posted : Tuesday, April 3, 2007 9:04:24 AM(UTC)
PimSavie

Groups: Registered
Posts: 1


Hello

I apologize beforehand for my bad English

I utilise your functions(offices) TWAIN with WINDEV and i have a problem with the function L_TwainInitSession() : it return me "-789" and i don't know why

I copy you my code to see if you find the problem

HndlLib est un entier
nHandle est un entier = Handle(FEN_test)
HTWAINSESSION est un entier sans signe sur 4

APPLICATIONDATA est une structure
 uStructSize est un entier
 hWnd est un entier 
 zManufacturerName est une chaîne fixe de 256
 zAppProductFamily est une chaîne fixe de 256
 szVersionInfo est une chaîne fixe de 32
 szAppName est une chaîne fixe de 256
FIN

PAppData est un APPLICATIONDATA
PAppData:hWnd = Handle(FEN_test)
PAppData:uStructSize = 4+4+256+256+32+256
HTWAINSESSION=Null

// Chargement de la librairie
HndlLib=ChargeDLL("Lttwn15u.dll")
SI HndlLib=0 ALORS
 Info("La Librairie n'est pas chargée")
 RETOUR
FIN

Trace("twain source : " + AppelDLL32("Lttwn15u.dll","L_IsTwainAvailable",nHandle))
Trace("Initialisation : " + AppelDLL32("Lttwn15u.dll","L_TwainInitSession", &HTWAINSESSION, &PAppData))

// Décharge la librairie
DéchargeDLL(HndlLib)

 

Furthermore, I do not find the value of SUCCESS in the documentation; would you do can indicate it to me svp?

 

Thanks

Karine

 

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#2 Posted : Thursday, April 5, 2007 7:50:14 AM(UTC)
Maen Hasan

Groups: Registered, Tech Support
Posts: 1,326

Was thanked: 1 time(s) in 1 post(s)

Hello,

This error is ERROR_INVALID_STRUCT_SIZE "Invalid structure size".

I checked the size of the APPLICATIONDATA structure and it supposed to be 1612. Try to set the size of the structure to the correct value in your code and retry the same issue.

Thanks,
Maen Badwan
LEADTOOLS Technical Support
 
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