Loader : Use CxbxMessageBox (a wrapper for Windows' MessageBox API) wherever possible, to avoid repeating the TEXT("Cxbx-Reloaded") caption everywhere, and a different argument-order allowing default argument values and thus more compact code.

src/common/AddressRanges.h

@@ -26,7 +26,7 @@
 // ******************************************************************
 #pragma once
 
-#ifndef CXBXR_EMU_EXPORTS // Only trim Windows symbols CxbxLoader, not in cxbxr-emu
+#ifndef CXBXR_EMU_EXPORTS // Only trim Windows symbols in cxbxr-ldr.exe, not in cxbxr-emu.dll (TODO : What about cxbxr.exe and cxbx.exe?)
 #include <SDKDDKVer.h>
 #define WIN32_LEAN_AND_MEAN             // Exclude rarely-used stuff from Windows headers
 #endif // CXBXR_EMU_EXPORTS

src/common/VerifyAddressRanges.cpp

@@ -31,8 +31,8 @@
 bool VerifyBaseAddr()
 {
 	/*! CXBX_BASE_ADDR is defined as 0x00010000, which is the base address of
-	the CxbxLoader.exe host executable.
-	Set in CxbxLoader.exe Project options, Linker, Advanced, Base Address */
+	the cxbxr-ldr.exe host executable.
+	Set in cxbxr-ldr.exe Project options, Linker, Advanced, Base Address */
 	return ((UINT_PTR)GetModuleHandle(nullptr) == CXBX_BASE_ADDR);
 }
 

src/core/hle/XAPI/Xapi.cpp

@@ -1188,7 +1188,7 @@ DWORD WINAPI XTL::EMUPATCH(XLaunchNewImageA)
 
 			if (PathFileExists(szDashboardPath))
 			{
-				MessageBox(CxbxKrnl_hEmuParent, "The title is rebooting to dashboard", "Cxbx-Reloaded", 0);
+				(void)CxbxMessageBox("The title is rebooting to dashboard", MB_OK, CxbxKrnl_hEmuParent);
 				lpTitlePath = "C:\\xboxdash.xbe";
 				xboxkrnl::LaunchDataPage->Header.dwLaunchDataType = LDT_FROM_DASHBOARD;
 				// Other options include LDT_NONE, LDT_FROM_DEBUGGER_CMDLINE and LDT_FROM_UPDATE

src/core/kernel/init/CxbxKrnl.cpp

@@ -495,6 +495,18 @@ HANDLE CxbxRestorePageTablesMemory(char* szFilePath_page_tables)
 
 #pragma optimize("", off)
 
+int CxbxMessageBox(const char* msg, UINT uType, HWND hWnd)
+{
+	return MessageBox(hWnd, msg, /*lpCaption=*/TEXT("Cxbx-Reloaded"), uType);
+}
+
+void CxbxShowError(const char* msg, HWND hWnd)
+{
+	const UINT uType = MB_OK | MB_TOPMOST | MB_SETFOREGROUND | MB_ICONERROR; // Note : MB_ICONERROR == MB_ICONSTOP == MB_ICONHAND
+
+	(void)CxbxMessageBox(msg, uType, hWnd);
+}
+
 void CxbxPopupMessageEx(CXBXR_MODULE cxbxr_module, LOG_LEVEL level, CxbxMsgDlgIcon icon, const char *message, ...)
 {
 	char Buffer[1024];
@@ -527,7 +539,7 @@ void CxbxPopupMessageEx(CXBXR_MODULE cxbxr_module, LOG_LEVEL level, CxbxMsgDlgIc
 
 	EmuLogEx(cxbxr_module, level, "Popup : %s", Buffer);
 
-	MessageBox(NULL, Buffer, TEXT("Cxbx-Reloaded"), uType);
+	(void)CxbxMessageBox(Buffer, uType);
 }
 
 void PrintCurrentConfigurationLog()
@@ -903,7 +915,7 @@ bool CreateSettings()
 {
 	g_Settings = new Settings();
 	if (g_Settings == nullptr) {
-		MessageBox(nullptr, szSettings_alloc_error, "Cxbx-Reloaded", MB_OK | MB_ICONERROR);
+		CxbxShowError(szSettings_alloc_error);
 		return false;
 	}
 
@@ -928,9 +940,9 @@ bool HandleFirstLaunch()
 
 		bool bElevated = CxbxIsElevated();
 		if (bElevated && !g_Settings->m_core.allowAdminPrivilege) {
-			int ret = MessageBox(NULL, "Cxbx-Reloaded has detected that it has been launched with Administrator rights.\n"
+			int ret = CxbxMessageBox("Cxbx-Reloaded has detected that it has been launched with Administrator rights.\n"
 				"\nThis is dangerous, as a maliciously modified Xbox titles could take control of your system.\n"
-				"\nAre you sure you want to continue?", "Cxbx-Reloaded", MB_YESNO | MB_ICONWARNING);
+				"\nAre you sure you want to continue?", MB_YESNO | MB_ICONWARNING);
 			if (ret != IDYES) {
 				return false;
 			}
@@ -1054,7 +1066,7 @@ void CxbxKrnlMain(int argc, char* argv[])
 			}
 			if (!isReady) {
 				EmuLog(LOG_LEVEL::WARNING, "GUI process is not ready!");
-				int mbRet = MessageBox(NULL, "GUI process is not ready, do you wish to retry?", TEXT("Cxbx-Reloaded"),
+				int mbRet = CxbxMessageBox("GUI process is not ready, do you wish to retry?",
 										MB_ICONWARNING | MB_RETRYCANCEL | MB_TOPMOST | MB_SETFOREGROUND);
 				if (mbRet == IDRETRY) {
 					continue;

src/core/kernel/init/CxbxKrnl.h

@@ -205,6 +205,10 @@ typedef enum _CxbxMsgDlgIcon {
     CxbxMsgDlgIcon_Error,
     CxbxMsgDlgIcon_Unknown
 } CxbxMsgDlgIcon;
+
+int CxbxMessageBox(const char* msg, UINT uType = MB_OK, HWND hWnd = NULL);
+
+void CxbxShowError(const char* msg, HWND hWnd = NULL);
 
 void CxbxPopupMessageEx(CXBXR_MODULE cxbxr_module, LOG_LEVEL level, CxbxMsgDlgIcon icon, const char *message, ...);
 
@@ -223,7 +227,7 @@ extern Xbe::Certificate *g_pCertificate;
 bool CxbxKrnlVerifyVersion(const char *szVersion);
 
 extern bool g_bIsDebugKernel;
-
+
 bool CheckLoadArgument(int argc, char* argv[], DWORD *pguiProcessID);
 
 bool CreateSettings();

src/core/kernel/support/Emu.cpp

@@ -170,7 +170,7 @@ bool EmuExceptionBreakpointAsk(LPEXCEPTION_POINTERS e)
 		"  Press Ignore to continue emulation.",
 		EIPToString(e->ContextRecord->Eip).c_str());
 
-	int ret = MessageBox(g_hEmuWindow, buffer, "Cxbx-Reloaded", MB_ICONSTOP | MB_ABORTRETRYIGNORE);
+	int ret = CxbxMessageBox(buffer, MB_ICONSTOP | MB_ABORTRETRYIGNORE, g_hEmuWindow);
 	if (ret == IDABORT)
 	{
 		EmuExceptionExitProcess();
@@ -201,7 +201,7 @@ void EmuExceptionNonBreakpointUnhandledShow(LPEXCEPTION_POINTERS e)
 		"  Press \"Cancel\" to debug.",
 		e->ExceptionRecord->ExceptionCode, EIPToString(e->ContextRecord->Eip).c_str());
 
-	if (MessageBox(g_hEmuWindow, buffer, "Cxbx-Reloaded", MB_ICONSTOP | MB_OKCANCEL) == IDOK)
+	if (CxbxMessageBox(buffer, MB_ICONSTOP | MB_OKCANCEL, g_hEmuWindow) == IDOK)
 	{
 		EmuExceptionExitProcess();
 	}
@@ -366,13 +366,13 @@ int ExitException(LPEXCEPTION_POINTERS e)
 
     fflush(stdout);
 
-    MessageBox(g_hEmuWindow, "Warning: Could not safely terminate process!", "Cxbx-Reloaded", MB_OK);
+    (void)CxbxMessageBox("Warning: Could not safely terminate process!", MB_OK, g_hEmuWindow);
 
     count++;
 
     if(count > 1)
     {
-        MessageBox(g_hEmuWindow, "Warning: Multiple Problems!", "Cxbx-Reloaded", MB_OK);
+        (void)CxbxMessageBox("Warning: Multiple Problems!", MB_OK, g_hEmuWindow);
         return EXCEPTION_CONTINUE_SEARCH;
     }
 

src/emulator/cxbxr-emu.cpp

@@ -124,43 +124,54 @@ DWORD WINAPI Emulate(int system)
 {
 	FUNC_EXPORTS
 
-	/*! Verify our host executable, CxbxLoader.exe, is loaded to base address 0x00010000 */
+	/*! Verify our host executable, cxbxr-ldr.exe, is loaded to base address 0x00010000 */
 	if (!VerifyBaseAddr()) {
-		MessageBox(NULL, "CxbxLoader.exe was not loaded to base address 0x00010000 (which is a requirement for Xbox emulation)", "Cxbx-Reloaded",
-			MB_OK | MB_ICONERROR);
+		CxbxShowError("cxbx-ldr.exe was not loaded to base address 0x00010000 (which is a requirement for Xbox emulation)");
 		return EXIT_FAILURE;
 	}
 
 	// Before doing anything else that might cause memory fragmentation,
 	// verify that we still got control over all ranges the loader reserved
 	if (!VerifyAddressRanges(system)) {
-		MessageBox(NULL, "Failed to claim required address ranges (which is a requirement for Xbox emulation)", "Cxbx-Reloaded",
-			MB_OK | MB_ICONERROR);
+		CxbxShowError("Failed to claim required address ranges (which is a requirement for Xbox emulation)");
 		return EXIT_FAILURE;
 	}
 
 	LPSTR CommandLine = GetCommandLine();
-	int argc;
+	if (!CommandLine) {
+		CxbxShowError("Couldn't retrieve command line!");
+		return EXIT_FAILURE;
+	}
+
+	int argc = 0;
 	PCHAR *argv = CommandLineToArgvA(CommandLine, &argc);
+	if (!argv) {
+		CxbxShowError("Couldn't parse command line!");
+		return EXIT_FAILURE;
+	}
 
 	DWORD guiProcessID = 0;
 	bool bHasLoadArgument = CheckLoadArgument(argc, argv, &guiProcessID);
+	if (!bHasLoadArgument) {
+		CxbxShowError("No /load argument on command line!");
+		return EXIT_FAILURE;
+	}
 
 	/*! initialize shared memory */
 	if (!EmuShared::Init(guiProcessID)) {
-		MessageBox(NULL, "Could not map shared memory!", "Cxbx-Reloaded", MB_OK | MB_ICONERROR);
+		CxbxShowError("Could not map shared memory!");
 		LocalFree(argv);
 		return EXIT_FAILURE;
 	}
 
-	HandleFirstLaunch();
-
-	if (bHasLoadArgument) {
-		CxbxKrnlMain(argc, argv);
-	} else {
-		// TODO : Enter "2nd GUI" mode here, as done in Cxbx's WinMain() - but how?
+	if (!HandleFirstLaunch()) {
+		CxbxShowError("First launch failed!");
+		EmuShared::Cleanup();
+		return EXIT_FAILURE;
 	}
 
+	CxbxKrnlMain(argc, argv);
+
 	LocalFree(argv);
 
 	/*! cleanup shared memory */
@@ -175,4 +186,3 @@ DWORD WINAPI Emulate(int system)
 	// This line will never be reached:
 	return EXIT_FAILURE;
 }
-

src/gui/WinMain.cpp

@@ -48,15 +48,13 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
 	// First detect if we are running on WoW64, if not, prevent Cxbx-Reloaded from starting
 	// Cxbx-Relaoded needs access to high memory, only exposed to WoW64.
 	if (!VerifyWow64()) {
-		MessageBox(NULL, "Cxbx-Reloaded can only run under WoW64\nThis means either a 64-bit version of Windows or Wine with a 64-bit prefix", "Cxbx-Reloaded",
-			MB_OK | MB_ICONERROR);
+		CxbxShowError("Cxbx-Reloaded can only run under WoW64\nThis means either a 64-bit version of Windows or Wine with a 64-bit prefix");
 		return EXIT_FAILURE;
 	}
 
 	/*! verify Cxbx.exe is loaded to base address 0x00010000 */
 	if (!VerifyBaseAddr()) {
-		MessageBox(NULL, "Cxbx.exe is not loaded to base address 0x00010000 (which is a requirement for Xbox emulation)", "Cxbx-Reloaded",
-			MB_OK | MB_ICONERROR);
+		CxbxShowError("Cxbx.exe is not loaded to base address 0x00010000 (which is a requirement for Xbox emulation)");
 		return EXIT_FAILURE;
 	}
 
@@ -65,7 +63,10 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
 	bool bHasLoadArgument = CheckLoadArgument(__argc, __argv, &guiProcessID);
 
 	/*! initialize shared memory */
-	EmuShared::Init(guiProcessID);
+	if (!EmuShared::Init(guiProcessID)) {
+		CxbxShowError("Could not map shared memory!");
+		return EXIT_FAILURE;
+	}
 
 	if (!HandleFirstLaunch()) {
 		EmuShared::Cleanup();
@@ -121,9 +122,8 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
     }
 
     /*! if an error occurred, notify user */
-    if(MainWindow->HasError())
-    {
-        MessageBox(NULL, MainWindow->GetError().c_str(), "Cxbx-Reloaded", MB_ICONSTOP | MB_OK);
+    if(MainWindow->HasError()) {
+		CxbxShowError(MainWindow->GetError().c_str());
     }
 
     delete MainWindow;

src/loader/cxbxr-ldr.cpp

@@ -81,10 +81,6 @@ unsigned char virtual_memory_placeholder[VM_PLACEHOLDER_SIZE] = { 0 }; // = { OP
 
 void OutputMessage(const char *msg)
 {
-	if (!msg) {
-		return;
-	}
-
 	OutputDebugStringA(msg); // Send message to debugger output too
 
 	HANDLE hConsoleOutput = GetStdHandle(STD_OUTPUT_HANDLE);