hellodll.java

java程序中调用DLL文件的例子

import org.jawin.COMException;
import org.jawin.FuncPtr;
import org.jawin.ReturnFlags;

/**
 * Demo that uses the Win32 MessageBoxW API-method.
 *
 * @version     $Revision: 1.3 $
 * @author      Stuart Halloway, http://www.relevancellc.com/halloway/weblog/
 */
public class HelloDll {

	public static void main(String[] args) throws Exception {
		FuncPtr msgBox = null;
		try {
			msgBox = new FuncPtr("C:\\WINDOWS\\system32\\USER32.DLL", "MessageBoxW");
			msgBox.invoke_I(0, "Hello From a DLL", "From Jawin", 0, ReturnFlags.CHECK_FALSE);
		} catch (COMException e) {
			// handle exception
			e.printStackTrace();
			throw e;
		} 
	}
}