jna

how do I access custom .lib / .dll functions using JNA? Can someone provide an example? Thank you. luiscubal Example ( from Wikipedia ): import com.sun.jna.win32.StdCallLibrary; import com.sun.jna.Native; /** Simple example of Windows native library declaration and usage. */ public class BeepExample { public interface Kernel32 extends StdCallLibrary { // FREQUENCY is expressed in hertz and ranges from 37 to 32767 // DURATION is expressed in milliseconds public boolean Beep(int FREQUENCY, int DURATION); public void Sleep(int DURATION); } public static void main(String[] args) { Kernel32 lib =

I am trying to call a method in a DLL using JNA. So far have loaded the DLL using Runtime.getRuntime().load("myworkspace/test.dll"); This dll contaings a method that I need to access. How can I execute the method present in DLL in my Java file. Do I create an object or something of the DLL and then get the method name after the dot operator. Rahul Tripathi From the source : package jnahelloworldtest; import com.sun.jna.Library; import com.sun.jna.Native; import com.sun.jna.NativeLong; import com.sun.jna.Platform; import com.sun.jna.*; /** Simple example of native library declaration and usage.

I need to call external DLL library function from Java code. I use Netbeans 7.2. My dll's functions are: Boolean isValid(string word) List<String> getWords(String word) I'm following this example. But I don't know how declare my dll functions. And I found another link . But it doesn't work for me. I stumbled upon the same problem of "calling DLL from Java" and first was frustrated about the complexity. Yet, there is an elegant solution (might also be interesting for the people over there in the processing.org habitat..) Given the rather "general" form of the question (maybe, downrating is not

Does anyone know how to capture a screen shot in Java (not it's own screen, but any other window on the desktop and they don't necessarily have to be the active window) in Windows? There are a number of threads here on this similar subject, but I have yet to find an answer. I've tried using JNA, but became stuck after a few attempts. For example... public class Main { public static void main(String[] args) { Main m = new Main(); List<WindowInfo> list = m.getWindows(); for (int i=0;i<list.size();i++) { WindowInfo info = list.get(i); System.out.println(info.getTitle()); } WindowInfo wi = list

Let me start by saying that my understanding of how JNA and Java direct native memory allocations is visceral at best, so I'm trying to describe my understanding of what's going on. Any corrections in addition to responses would be great... I'm running an application that mixes Java and C native code using JNA and am running accross a reproducible issue with the Java Garbage Collector failing to free references to direct native memory allocations, resulting in the C heap running out of memory. I'm positive that my C application is not the source of the allocation issue, as I'm passing a java