win-get-clipboard-utf8.cpp

#include <iostream>
#include <Windows.h>
#include <string>
#include <codecvt>

// https://stackoverflow.com/questions/14762456/getclipboarddatacf-text
std::wstring GetClipboardText()
{
	// Try opening the clipboard
	if (!OpenClipboard(nullptr))
		return L"";

	// Get handle of clipboard object for ANSI text
	HANDLE hData = GetClipboardData(CF_UNICODETEXT);
	if (hData == nullptr)
		return L"";

	// Lock the handle to get the actual text pointer
	wchar_t* pszText = static_cast<wchar_t*>(GlobalLock(hData));
	if (pszText == nullptr)
		return L"";

	// Save text in a string class instance
	std::wstring text(pszText);

	// Release the lock
	GlobalUnlock(hData);

	// Release the clipboard
	CloseClipboard();

	return text;
}

int main()
{
	SetConsoleOutputCP(CP_UTF8);
	setvbuf(stdout, nullptr, _IOFBF, 1000);
	std::wstring data = GetClipboardText();
	std::wstring_convert<std::codecvt_utf8<wchar_t>> uutf8;
	std::cout << uutf8.to_bytes(data) << std::endl;
}