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Telegram/SourceFiles/_other/startup_task_win.cpp

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+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#include <windows.h>
+#include <shellapi.h>
+
+#include <array>
+#include <string>
+
+using namespace std;
+
+constexpr auto kMaxPathLong = 32767;
+
+[[nodiscard]] std::wstring ExecutableDirectory() {
+	auto exePath = std::array<WCHAR, kMaxPathLong + 1>{ 0 };
+	const auto exeLength = GetModuleFileName(
+		nullptr,
+		exePath.data(),
+		kMaxPathLong + 1);
+	if (!exeLength || exeLength >= kMaxPathLong + 1) {
+		return {};
+	}
+	const auto exe = std::wstring(exePath.data());
+	const auto last1 = exe.find_last_of('\\');
+	const auto last2 = exe.find_last_of('/');
+	const auto last = std::max(
+		(last1 == std::wstring::npos) ? -1 : int(last1),
+		(last2 == std::wstring::npos) ? -1 : int(last2));
+	if (last < 0) {
+		return {};
+	}
+	return exe.substr(0, last);
+}
+
+int APIENTRY wWinMain(
+		HINSTANCE instance,
+		HINSTANCE prevInstance,
+		LPWSTR cmdParamarg,
+		int cmdShow) {
+	const auto directory = ExecutableDirectory();
+	if (!directory.empty()) {
+		ShellExecute(
+			nullptr,
+			nullptr,
+			(directory + L"\\Telegram.exe").c_str(),
+			L"-autostart",
+			directory.data(),
+			SW_SHOWNORMAL);
+	}
+	return 0;
+}