warn if steam registry doesn't exists

src/client/component/auth.cpp

@@ -162,7 +162,6 @@ namespace auth
 
 			if (xuid != key.get_hash())
 			{
-				//MessageBoxA(nullptr, steam_id.data(), std::to_string(key.get_hash()).data(), 0);
 				network::send(*from, "error",
 					utils::string::va("XUID doesn't match the certificate: %llX != %llX", xuid, key.get_hash()), '\n');
 				return;

src/client/component/exception.cpp

@@ -101,7 +101,7 @@ namespace exception
 			utils::thread::suspend_other_threads();
 			show_mouse_cursor();
 
-			MessageBoxA(nullptr, error_str.data(), "H1-Mod ERROR", MB_ICONERROR);
+			MSG_BOX_ERROR(error_str.data());
 			TerminateProcess(GetCurrentProcess(), exception_data.code);
 		}
 

src/client/component/system_check.cpp

@@ -90,9 +90,8 @@ namespace system_check
 
 			if (!is_valid())
 			{
-				MessageBoxA(nullptr, "Your game files are outdated or unsupported.\n"
-					"Please get the latest officially supported Call of Duty: Modern Warfare Remastered files, or you will get random crashes and issues.",
-					"Invalid game files!", MB_ICONINFORMATION);
+				MSG_BOX_INFO("Your game files are outdated or unsupported.\n"
+					"Please get the latest officially supported Call of Duty: Modern Warfare Remastered files, or you will get random crashes and issues.");
 			}
 		}
 	};

src/client/loader/loader.cpp

@@ -152,7 +152,7 @@ void loader::load_exception_table(const utils::nt::library& target, const utils:
 
 	if (!RtlAddFunctionTable(function_list, entry_count, DWORD64(target.get_ptr())))
 	{
-		MessageBoxA(nullptr, "Setting exception handlers failed.", "Error", MB_OK | MB_ICONERROR);
+		MSG_BOX_ERROR("Setting exception handlers failed.");
 	}
 
 	{

src/client/main.cpp

@@ -81,6 +81,26 @@ void get_aslr_patched_binary(std::string* binary, std::string* data)
 	*binary = patched_binary;
 }
 
+bool is_steam_registry_found()
+{
+	static bool is_steam_installed = false;
+	static bool is_steam_installed_set = false;
+
+	if (!is_steam_installed_set)
+	{
+		HKEY key = nullptr;
+		if (RegOpenKeyExA(HKEY_CURRENT_USER, "Software\\Valve\\Steam", 0, KEY_ALL_ACCESS, &key) == ERROR_SUCCESS)
+		{
+			is_steam_installed = true;
+			RegCloseKey(key);
+		}
+
+		is_steam_installed_set = true;
+	}
+
+	return is_steam_installed;
+}
+
 FARPROC load_binary(const launcher::mode mode, uint64_t* base_address)
 {
 	loader loader;
@@ -91,6 +111,11 @@ FARPROC load_binary(const launcher::mode mode, uint64_t* base_address)
 		if (library == "steam_api64.dll"
 			&& function != "SteamAPI_GetSteamInstallPath") // Arxan requires one valid steam api import - maybe SteamAPI_Shutdown is better?
 		{
+			if (!is_steam_registry_found())
+			{
+				MSG_BOX_WARN("Could not find Steam in the registry. If Steam is not installed, you must install it for H1-Mod to work.");
+			}
+
 			return self.get_proc<FARPROC>(function);
 		}
 		else if (function == "ExitProcess")
@@ -234,7 +259,7 @@ int main()
 		}
 		catch (std::exception& e)
 		{
-			MessageBoxA(nullptr, e.what(), "ERROR", MB_ICONERROR);
+			MSG_BOX_ERROR(e.what());
 			return 1;
 		}
 	}

src/client/std_include.hpp

@@ -59,6 +59,10 @@
 #undef min
 #endif
 
+#define MSG_BOX_INFO(message) MessageBoxA(nullptr, message, "H1-Mod: WARNING", MB_ICONINFORMATION);
+#define MSG_BOX_WARN(message) MessageBoxA(nullptr, message, "H1-Mod: WARNING", MB_ICONWARNING);
+#define MSG_BOX_ERROR(message) MessageBoxA(nullptr, message, "H1-Mod: ERROR", MB_ICONERROR);
+
 #include <map>
 #include <atomic>
 #include <vector>