THECODEPROGRAM

Let's begin.

In this example we are going to call the same functions which I have talked at How to use Interop Services in C# (Focus on external window). You can take a look at that article to see what are we going to do here.

Let's get started then.

LIBS += -lUser32

So in our main.c file we can start to write required codes.

#include <QCoreApplication>
#include <QThread>
#include <iostream>
//We are telling the program with below library, we are going to access to the system API's
#include "Windows.h"

using namespace std;

HWND window = FindWindowW(NULL, L"exampleText.txt - Not Defteri");

if (window != 0)
    {
        SetForegroundWindow(window);
        //Waiting a little bit is good
        QThread::msleep(1000);
    }

Now we are ready to send texts inside of selected program above.

        //First we need to specify the text which will be sent
        std::wstring text = L"Burak Hamdi TUFAN\nthecodeprogram.com\n";
        //Then we are going to create a vector which will contain key inputs
        std::vector< INPUT > vec;

        for(auto ch : text)
        {
            INPUT key_input = { 0 };
            //Make configuations of the key input
            //We specify the every character of the text as unicode keyboard_input
            key_input.type = INPUT_KEYBOARD;
            key_input.ki.dwFlags = KEYEVENTF_UNICODE;
            key_input.ki.wScan = ch;
            vec.push_back(key_input);
        }
        //Lastly we send the characters by same order
        SendInput(vec.size(), vec.data(), sizeof(INPUT));

That is all in this article.

You can reach the c file on Github via : https://github.com/thecodeprogram/TheSingleFiles/blob/master/QUsingWindowsApi_Example.cpp

Burak Hamdi TUFAN