windows消息队列C语言,通过Windows消息队列对VB程序进行操作

运用JNA来操作DLL函数，获取VB窗口程序句柄，进而向VB程序窗口程序的消息队列发送消息，代码如下：

package com.stupidzhe;

import com.sun.jna.Native;

import com.sun.jna.platform.win32.User32;

import com.sun.jna.platform.win32.WinDef;

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

import com.sun.jna.platform.win32.WinUser;

import java.util.concurrent.TimeUnit;

public class JnaTest {

public static void main(String[] args) throws InterruptedException {

char[] windowText = new char[512];

HWND hwnd = User32.INSTANCE.GetForegroundWindow(); // then you can call it!

User32.INSTANCE.GetWindowText(hwnd, windowText, 512);

System.out.println(Native.toString(windowText));

HWND btn = User32.INSTANCE.FindWindowEx(hwnd, null, null, null);

WinUser.MSG msg = new WinUser.MSG();

int result;

while (true) {

WinDef.LRESULT res = User32.INSTANCE.SendMessage(btn, 0xF5, new WinDef.WPARAM(0), new WinDef.LPARAM(0));

User32.INSTANCE.GetWindowText(btn, windowText, 512);

System.out.println(Native.toString(windowText));

TimeUnit.SECONDS.sleep(2);

}

}

}