Java JNA FindWindow() - 查找函数时出错 'FindWindow' : The specified procedure could not be found

Question

我正在尝试使用 JNA 将名为 MyWindowTitle 的窗口置于最前面。

import com.sun.jna.Native;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.platform.win32.WinDef.HWND;

public class ToFront {

public static interface User32 extends StdCallLibrary {
    final User32 instance = (User32) Native.loadLibrary ("user32", User32.class);
    HWND FindWindow(String winClass, String title); 
    boolean ShowWindow(HWND hWnd, int nCmdShow);
    boolean SetForegroundWindow(HWND hWnd);

}


public static void main(String[] args) {
    HWND hwnd = User32.instance.FindWindow(null, "MyWindowTitle"); 
    User32.instance.ShowWindow(hwnd, 9); 
    User32.instance.SetForegroundWindow(hwnd); 
}

}

我收到以下异常 java.lang.UnsatisfiedLinkError: Error looking up function 'FindWindow': The specified procedure could not be found.

Answer 1

您可以使用以下调用 FindWindowEx 的代码。请注意，FindFindow 不会根据这篇文章搜索子窗口 http://msdn.microsoft.com/en-us/library/windows/desktop/ms633499(v=vs.85).aspx

import com.sun.jna.Native;
import com.sun.jna.platform.win32.User32;
import com.sun.jna.platform.win32.WinDef.HWND;
import com.sun.jna.win32.StdCallLibrary;

public class SomeClass 
{
    public static interface User32 extends StdCallLibrary
    {
         final User32 instance = (User32) Native.loadLibrary ("user32", User32.class);
         HWND FindWindowExA(HWND hwndParent, HWND childAfter, String className, String windowName);
         HWND FindWindowA(String className, String windowName);
    }

    public static void main(String[] args)
    {
        HWND hwndShell = User32.instance.FindWindowExA(null, null, "Shell_TrayWnd", null);
        HWND hWnd = User32.instance.FindWindowExA(hwndShell, null, "Start", "Start");     
    }
}