Due To The Inconvenience, I've moved to C# for this project, no further comments needed
I've encountered an issue during the development of a C++ tidbit, which sends keystrokes based on user input.
Upon trying to send the actual keystrokes, I am greeted with an error.
<error-type> message
I have posted a code snippet down below. Any help is very much appreciated.
/*Code snippet from program that handles actual keypresses*/
string message;
getline(cin, message);
SendInput(message);
Look at documentation for SendInput
You have to setup the INPUT structure, then pass array of INPUT.
#include <iostream>
#include <string>
#include <vector>
#include <Windows.h>
int main()
{
std::wstring msg = L"ΨΦΩ, ελη, ABC, abc, 123";
//or std::string msg = "ABCD - abcd - 1234";
std::vector<INPUT> vec;
for(auto ch : msg)
{
INPUT input = { 0 };
input.type = INPUT_KEYBOARD;
input.ki.dwFlags = KEYEVENTF_UNICODE;
input.ki.wScan = ch;
vec.push_back(input);
input.ki.dwFlags |= KEYEVENTF_KEYUP;
vec.push_back(input);
}
//Find a notepad window or another window for send
HWND hwnd = FindWindow("Notepad", 0);
if (hwnd)
SetForegroundWindow(hwnd);
else
std::cout << "no window!\n";
SendInput(vec.size(), vec.data(), sizeof(INPUT));
return 0;
}
Note that ANSI is deprecated in Windows. This code with std::string works only for ASCII characters. For UNICODE compatibility use std::wstring
KEYEVENTF_UNICODE expects UTF-16 input, and separate INPUT down/up pairs for UTF-16 surrogate pairs. If you need to send non-ASCII strings, you need to convert them to this format.
for loop into a normal for loop: for(size_t i = 0; i < msg.size(); ++i) { ... input.ki.wScan = (WORD) msg[i]; ... }Check this out: SendInput() Keyboard letters C/C++
You can't really just pass a entire string to it.
INPUT at a time, it's supposed to send an array.