qt 获取windows 的消息（通过MFC的DLL的透明窗体转发消息）good

qt 给win32 发送消息很简单，但是要获取windows 消息却十分复杂，最后想了一个不是很完美 但是也是以现在本人能力所能实现的唯一途径了，基本原理是 利用vc编写一个mfc 的dll ，这个dll 中创建一个透明窗体，利用这个dll 获取win32 API 消息。

源码 已经在vs2010 vs6.0 qt 4.7 下试验通过

下面贴出 重要的实现源码：

VC dll- ReceiveMessage.cpp

#include "stdafx.h"

#include "resource.h"

typedef int (*CALLBACKFUNC)(DWORD Type, DWORD position);

CALLBACKFUNC pfnCallback_tmp;

HINSTANCE hInstance;

unsigned long WM_UNITOKEN_NOTIFY = RegisterWindowMessage("notify_HuFeng");

BOOL APIENTRY DllMain( HANDLE hModule, 
                       DWORD  ul_reason_for_call, 
                       LPVOID lpReserved )

{
 switch(ul_reason_for_call)
 {
 case DLL_PROCESS_ATTACH:
  hInstance = (HINSTANCE)hModule;
  break;
 }
    return TRUE;
}

HWND m_hWnd = 0;
unsigned long nStep = 0;
unsigned long TotalStep = 0;

//INT_PTR __stdcall

BOOL CALLBACK DialogProcedure(HWND hWnd, UINT Message, WPARAM wParam, LPARAM lParam)

{

switch(Message)

case WM_CREATE:{
  break;};
 case WM_COMMAND:
  {
   SendMessage(hWnd, WM_DESTROY, 0, 0);
   break;
  };
 case WM_DESTROY:{ PostQuitMessage(0); break; };
 case WM_INITDIALOG : {   break;};
 default :{
             if(Message==WM_UNITOKEN_NOTIFY)
             {    pfnCallback_tmp(wParam,lParam);  };break;}
 }
 
 return 0;

}

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)

{

if (message==WM_DESTROY)
 {
   PostQuitMessage (0) ;
   return 0 ;
 }
 return DefWindowProc (hwnd, message, wParam, lParam) ;

}

DWORD __stdcall  ThreadFuction(LPVOID pParam)

{

MSG Msg;

HWND hWnd_HuFeng= CreateDialog(hInstance, MAKEINTRESOURCE(IDD_DIALOGH),  NULL, DialogProcedure);

int erro = GetLastError();

ShowWindow(hWnd_HuFeng, SW_HIDE);

while(GetMessage(&Msg, NULL, 0, 0))
   {
     TranslateMessage(&Msg);
     DispatchMessage(&Msg);
    }
 return 0;

}

extern "C" void __stdcall ReceiveMessageFun(CALLBACKFUNC pfnCallback)

{

DWORD ThreadID;

HANDLE  m_hThread;

pfnCallback_tmp = pfnCallback;
   m_hThread=CreateThread(NULL, 0, ThreadFuction, NULL, 0, &ThreadID);
   CloseHandle(m_hThread);

}

QT 接收部分

头文件.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include "windows.h"
#include "qthread.h"
namespace Ui {
    class MainWindow;
}

class MainWindow : public QMainWindow {
    Q_OBJECT
public:
    MainWindow(QWidget *parent = 0);
    ~MainWindow();

protected:
    void changeEvent(QEvent *e);

private:
    Ui::MainWindow *ui;
};

class MyThread : public QThread
{
public:
    void run();
    void foo();
};

#endif // MAINWINDOW_H

QT 接收部分

receive.cpp

#include <QtGui/QApplication>
#include "mainwindow.h"

#include <QtCore/qobject.h>

#include <limits.h>
#include "QLibrary"
typedef int (* CALLBACKFUNC)(unsigned long Type, unsigned long position);
//extern "C" void __stdcall ReceiveMessageFun(CALLBACKFUNC pfnCallback);
CALLBACKFUNC pfnCallback;

int outputMsg(unsigned long Type, unsigned long position)
{
        qDebug("Received Message");
        return 0;
}

int main(int argc, char *argv[])
{
    int m;
    QApplication a(argc, argv);
   //MainWindow w;
      // outputMsg(12,34);
    MyThread aa;
    // aa.start();
    aa.run();
   // w.show();
    return a.exec();
}

void MyThread::run()
{
     QLibrary myLib("../ReceiveMessage");
     if(myLib.load())
       {
        qDebug("link lib success");}

else
    {
          qDebug("link lib failed");
    }
    pfnCallback = outputMsg;
    typedef void(*ReceiveMessageFun_HF)(CALLBACKFUNC pfnCallback);//库版本
    ReceiveMessageFun_HF pGetLibraryVerion =(ReceiveMessageFun_HF)myLib.resolve("ReceiveMessageFun");
    pGetLibraryVerion(pfnCallback);
   // sleep(1);
}

QT 发送部分 头文件

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include "windows.h"
#include "stdlib.h"
namespace Ui {
    class MainWindow;
}

class MainWindow : public QMainWindow {
    Q_OBJECT
public:
    MainWindow(QWidget *parent = 0);
    ~MainWindow();

protected:
    void changeEvent(QEvent *e);
    void _SendNotify(DWORD fuccode,DWORD retcode);
private:
    Ui::MainWindow *ui;
    DWORD a,b;
private slots:
    void on_pushButton_clicked();
};

#endif // MAINWINDOW_H

QT 发送部分

receive.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "QFileDialog"
#include "QDebug"
#include "QTextCodec"
MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::changeEvent(QEvent *e)
{
    QMainWindow::changeEvent(e);
    switch (e->type()) {
    case QEvent::LanguageChange:
        ui->retranslateUi(this);
        break;
    default:
        break;
    }
}

void MainWindow::on_pushButton_clicked()
{ 
     a=200;
     b=50;
     MainWindow::_SendNotify(a, b);
}

void MainWindow::_SendNotify(DWORD fuccode, DWORD retcode)
{
    unsigned long WM_UNITOKEN_NOTIFY=::RegisterWindowMessageW(L"notify_HuFeng");
    PostMessageW(HWND_BROADCAST, WM_UNITOKEN_NOTIFY, fuccode, retcode);
}

代码不尽完善 只是提供一个思路

http://blog.csdn.net/hufengvip/article/details/5974814