asked on

DLL HELP!!!

Hi there.

Im struggling with a project that includes a dll, so i got an example off the net that shud run quite simply but it does not, here is the source code and the error.

I dont know if it could be my system configeration?

thanx.

class ShowMsgBox
{
public static void main(String args[])
{
MessageBox(0, "It worked!",
"This is a message box from Java", 0);
}

/** @dll.import("USER32") */
private static native int MessageBox(
int hwnd
, String text
, String title
, int style
);
}

ERROR:

>java ShowMsgBox
Exception in thread "main" java.lang.UnsatisfiedLinkError: ShowMsgBox.MessageBox(ILjava/lang/String;Ljava/lang/String;I)I
at ShowMsgBox.MessageBox(Native Method)
at ShowMsgBox.main(ShowMsgBox.java:5)
>Exit code: 1

ASKER CERTIFIED SOLUTION

gatorvip

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Mayank S

Try putting it in your JDK's bin directory or just put it into your Windows\System32 directory.

WalterRautenbach

ASKER

it is a simple program which calls the systems USER32.DLL so the dll is in a class path.
Does any one know how the /** @dll.import("USER32") */ statment is used.
im using that statment to try avoid creating an new C++ file to connect to a DLL.

Thanx

gatorvip

Use System.load("user32");

See http://forum.java.sun.com/thread.jspa?threadID=596284&messageID=3154658 (last post currently) for a very nice example of cross-platform library load

Mayank S

>> it is a simple program which calls the systems USER32.DLL so the dll is in a class path.

You mean PATH, not Classpath?

SOLUTION

Mayank S

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