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  • Subject: Re calling DLL in Java
  • From: MBarton@xxxxxxxxxx
  • Date: Thu, 17 May 2001 10:28:42 +0100


Hi
     this is a Java question (but not strictly a JAVA400 question)
If anyone has any experience of this pls can you help

I am calling a DLL in java but am having a problem with one of the return
values.

variable sessionHandle is an order of magnitude out (sessionHandle is a
ULONG field).
All documentation I have read says use an int for a ULONG variable.

/** @dll.import("thedll.dll") */
static native int initFunction(int sessionHandle[],  StringBufferUserName,  int 
fExclusive,  int lpErrorProc[]);

errorCode =  initFunction(sessionHandle, UserName,  1,  errorProc);

The call is ok, errorCode = 0 and the sessionHandle contains a number (always 
the same) - 22879572
however, when I call the function from a c++ program, the number (always the 
same) is 6832704.

I beleive the function is working but somehow the sessionHandle is incorrect.
Calling a subsequent function with the sessionHandle results in an errorCode 
that the initFunction has not
been called.

 I have read all documentation I can find but cannot get it to work.

Mike

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