[ui] keep user preferred image type when saving drive to VHD

* Also fix a Coverity warning and use a better description for SELECT image types.

src/format.c

@@ -1642,12 +1642,13 @@ DWORD WINAPI FormatThread(void* param)
 	if ((boot_type == BT_IMAGE) && write_as_image) {
 		// Special case for FFU images
 		if (img_report.compression_type == IMG_COMPRESSION_FFU) {
-			char cmd[MAX_PATH + 128], *physical;
+			char cmd[MAX_PATH + 128], *physical = NULL;
 			// Should have been filtered out beforehand
 			assert(has_ffu_support);
 			safe_unlockclose(hPhysicalDrive);
 			physical = GetPhysicalName(SelectedDrive.DeviceNumber);
 			static_sprintf(cmd, "dism /Apply-Ffu /ApplyDrive:%s /ImageFile:\"%s\"", physical, image_path);
+			safe_free(physical);
 			uprintf("Running command: '%s", cmd);
 			cr = RunCommandWithProgress(cmd, sysnative_dir, TRUE, MSG_261);
 			if (cr != 0 && !IS_ERROR(FormatStatus)) {

src/net.c

@@ -1040,7 +1040,7 @@ static DWORD WINAPI DownloadISOThread(LPVOID param)
 #endif
 			EXT_DECL(img_ext, GetShortName(url), __VA_GROUP__("*.iso"), __VA_GROUP__(lmprintf(MSG_036)));
 			img_save.Type = VIRTUAL_STORAGE_TYPE_DEVICE_ISO;
-			img_save.ImagePath = FileDialog(TRUE, NULL, &img_ext, 0);
+			img_save.ImagePath = FileDialog(TRUE, NULL, &img_ext, NULL);
 			if (img_save.ImagePath == NULL) {
 				goto out;
 			}

src/rufus.c

@@ -139,7 +139,7 @@ char embedded_sl_version_str[2][12] = { "?.??", "?.??" };
 char embedded_sl_version_ext[2][32];
 char ClusterSizeLabel[MAX_CLUSTER_SIZES][64];
 char msgbox[1024], msgbox_title[32], *ini_file = NULL, *image_path = NULL, *short_image_path;
-char *archive_path = NULL, image_option_txt[128], *fido_url = NULL;
+char *archive_path = NULL, image_option_txt[128], *fido_url = NULL, *save_image_type = NULL;
 StrArray BlockingProcess, ImageList;
 // Number of steps for each FS for FCC_STRUCTURE_PROGRESS
 const int nb_steps[FS_MAX] = { 5, 5, 12, 1, 10, 1, 1, 1, 1 };
@@ -1013,7 +1013,7 @@ BOOL CALLBACK LogCallback(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
 				log_size = GetDlgItemTextU(hDlg, IDC_LOG_EDIT, log_buffer, log_size);
 				if (log_size != 0) {
 					log_size--;	// remove NUL terminator
-					filepath =  FileDialog(TRUE, user_dir, &log_ext, 0);
+					filepath =  FileDialog(TRUE, user_dir, &log_ext, NULL);
 					if (filepath != NULL)
 						FileIO(FILE_IO_WRITE, filepath, &log_buffer, &log_size);
 					safe_free(filepath);
@@ -2567,7 +2567,7 @@ static INT_PTR CALLBACK MainCallback(HWND hDlg, UINT message, WPARAM wParam, LPA
 				EXT_DECL(arch_ext, NULL, __VA_GROUP__("*.zip"), __VA_GROUP__(lmprintf(MSG_309)));
 				if (image_path == NULL)
 					break;
-				archive_path = FileDialog(FALSE, NULL, &arch_ext, 0);
+				archive_path = FileDialog(FALSE, NULL, &arch_ext, NULL);
 				if (archive_path != NULL) {
 					struct __stat64 stat64 = { 0 };
 					_stat64U(archive_path, &stat64);
@@ -2591,10 +2591,10 @@ static INT_PTR CALLBACK MainCallback(HWND hDlg, UINT message, WPARAM wParam, LPA
 					char extensions[128] = "*.iso;*.img;*.vhd;*.vhdx;*.usb;*.bz2;*.bzip2;*.gz;*.lzma;*.xz;*.Z;*.zip;*.wim;*.esd;*.vtsi";
 					if (has_ffu_support)
 						strcat(extensions, ";*.ffu");
-					// If declared globaly, lmprintf(MSG_036) would be called on each message...
+					// If declared globaly, lmprintf(MSG_280) would be called on each message...
 					EXT_DECL(img_ext, NULL, __VA_GROUP__(extensions),
-						__VA_GROUP__(lmprintf(MSG_036)));
+						__VA_GROUP__(lmprintf(MSG_280)));
-					image_path = FileDialog(FALSE, NULL, &img_ext, 0);
+					image_path = FileDialog(FALSE, NULL, &img_ext, NULL);
 					if (image_path == NULL) {
 						if (old_image_path != NULL) {
 							// Reselect previous image
@@ -3556,6 +3556,7 @@ skip_args_processing:
 	enable_extra_hashes = ReadSettingBool(SETTING_ENABLE_EXTRA_HASHES);
 	ignore_boot_marker = ReadSettingBool(SETTING_IGNORE_BOOT_MARKER);
 	persistent_log = ReadSettingBool(SETTING_PERSISTENT_LOG);
+	save_image_type = ReadSettingStr(SETTING_PREFERRED_SAVE_IMAGE_TYPE);
 	// This restores the Windows User Experience/unattend.xml mask from the saved user
 	// settings, and is designed to work even if we add new options later.
 	wue_options = ReadSetting32(SETTING_WUE_OPTIONS);

src/rufus.h

@@ -655,7 +655,7 @@ extern BOOL DumpFatDir(const char* path, int32_t cluster);
 extern BOOL InstallSyslinux(DWORD drive_index, char drive_letter, int fs);
 extern uint16_t GetSyslinuxVersion(char* buf, size_t buf_size, char** ext);
 extern BOOL SetAutorun(const char* path);
-extern char* FileDialog(BOOL save, char* path, const ext_t* ext, DWORD options);
+extern char* FileDialog(BOOL save, char* path, const ext_t* ext, UINT* selected_ext);
 extern BOOL FileIO(enum file_io_type io_type, char* path, char** buffer, DWORD* size);
 extern unsigned char* GetResource(HMODULE module, char* name, char* type, const char* desc, DWORD* len, BOOL duplicate);
 extern DWORD GetResourceSize(HMODULE module, char* name, char* type, const char* desc);

src/rufus.rc

@@ -33,7 +33,7 @@ LANGUAGE LANG_NEUTRAL, SUBLANG_NEUTRAL
 IDD_DIALOG DIALOGEX 12, 12, 232, 326
 STYLE DS_SETFONT | DS_MODALFRAME | DS_CENTER | WS_MINIMIZEBOX | WS_POPUP | WS_CAPTION | WS_SYSMENU
 EXSTYLE WS_EX_ACCEPTFILES
-CAPTION "Rufus 4.2.2068"
+CAPTION "Rufus 4.2.2069"
 FONT 9, "Segoe UI Symbol", 400, 0, 0x0
 BEGIN
     LTEXT           "Drive Properties",IDS_DRIVE_PROPERTIES_TXT,8,6,53,12,NOT WS_GROUP
@@ -392,8 +392,8 @@ END
 //
 
 VS_VERSION_INFO VERSIONINFO
- FILEVERSION 4,2,2068,0
+ FILEVERSION 4,2,2069,0
- PRODUCTVERSION 4,2,2068,0
+ PRODUCTVERSION 4,2,2069,0
  FILEFLAGSMASK 0x3fL
 #ifdef _DEBUG
  FILEFLAGS 0x1L
@@ -411,13 +411,13 @@ BEGIN
             VALUE "Comments", "https://rufus.ie"
             VALUE "CompanyName", "Akeo Consulting"
             VALUE "FileDescription", "Rufus"
-            VALUE "FileVersion", "4.2.2068"
+            VALUE "FileVersion", "4.2.2069"
             VALUE "InternalName", "Rufus"
             VALUE "LegalCopyright", "© 2011-2023 Pete Batard (GPL v3)"
             VALUE "LegalTrademarks", "https://www.gnu.org/licenses/gpl-3.0.html"
             VALUE "OriginalFilename", "rufus-4.2.exe"
             VALUE "ProductName", "Rufus"
-            VALUE "ProductVersion", "4.2.2068"
+            VALUE "ProductVersion", "4.2.2069"
         END
     END
     BLOCK "VarFileInfo"

src/settings.h

@@ -1,7 +1,7 @@
 /*
  * Rufus: The Reliable USB Formatting Utility
  * Settings access, through either registry or INI file
- * Copyright © 2015-2022 Pete Batard <pete@akeo.ie>
+ * Copyright © 2015-2023 Pete Batard <pete@akeo.ie>
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -19,6 +19,7 @@
 #include <windows.h>
 #include <stdint.h>
 #include "rufus.h"
+#include "msapi_utf8.h"
 #include "registry.h"
 
 #pragma once
@@ -52,6 +53,7 @@ extern char* ini_file;
 #define SETTING_USE_UDF_VERSION             "UseUdfVersion"
 #define SETTING_USE_VDS                     "UseVds"
 #define SETTING_PERSISTENT_LOG              "PersistentLog"
+#define SETTING_PREFERRED_SAVE_IMAGE_TYPE   "PreferredSaveImageType"
 #define SETTING_PRESERVE_TIMESTAMPS         "PreserveTimestamps"
 #define SETTING_VERBOSE_UPDATES             "VerboseUpdateCheck"
 #define SETTING_WUE_OPTIONS                 "WindowsUserExperienceOptions"

src/stdlg.c

@@ -90,14 +90,9 @@ void SetDialogFocus(HWND hDlg, HWND hCtrl)
  * *EACH* thread you invoke FileDialog from, as GetDisplayName() will
  * return error 0x8001010E otherwise.
  */
-char* FileDialog(BOOL save, char* path, const ext_t* ext, DWORD options)
+char* FileDialog(BOOL save, char* path, const ext_t* ext, UINT* selected_ext)
 {
-	DWORD tmp;
+	size_t i;
-	OPENFILENAMEA ofn;
-	char selected_name[MAX_PATH];
-	char *ext_string = NULL, *all_files = NULL;
-	size_t i, j, ext_strlen;
-	BOOL r;
 	char* filepath = NULL;
 	HRESULT hr = FALSE;
 	IFileDialog *pfd = NULL;
@@ -108,167 +103,107 @@ char* FileDialog(BOOL save, char* path, const ext_t* ext, DWORD options)
 
 	if ((ext == NULL) || (ext->count == 0) || (ext->extension == NULL) || (ext->description == NULL))
 		return NULL;
-	dialog_showing++;
 
 	filter_spec = (COMDLG_FILTERSPEC*)calloc(ext->count + 1, sizeof(COMDLG_FILTERSPEC));
-	if (filter_spec != NULL) {
+	if (filter_spec == NULL)
-		// Setup the file extension filter table
+		return NULL;
-		for (i = 0; i < ext->count; i++) {
-			filter_spec[i].pszSpec = utf8_to_wchar(ext->extension[i]);
-			filter_spec[i].pszName = utf8_to_wchar(ext->description[i]);
-		}
-		filter_spec[i].pszSpec = L"*.*";
-		filter_spec[i].pszName = utf8_to_wchar(lmprintf(MSG_107));
 
-		hr = CoCreateInstance(save ? &CLSID_FileSaveDialog : &CLSID_FileOpenDialog, NULL, CLSCTX_INPROC,
+	dialog_showing++;
-			&IID_IFileDialog, (LPVOID)&pfd);
 
-		if (FAILED(hr)) {
+	// Setup the file extension filter table
-			SetLastError(hr);
+	for (i = 0; i < ext->count; i++) {
-			uprintf("CoCreateInstance for FileOpenDialog failed: %s\n", WindowsErrorString());
+		filter_spec[i].pszSpec = utf8_to_wchar(ext->extension[i]);
-			if (pfd != NULL) {
+		filter_spec[i].pszName = utf8_to_wchar(ext->description[i]);
-				IFileDialog_Release(pfd);
+	}
-				pfd = NULL;	// Just in case
+	filter_spec[i].pszSpec = L"*.*";
-			}
+	filter_spec[i].pszName = utf8_to_wchar(lmprintf(MSG_107));
-			goto fallback;
-		}
 
-		// Set the file extension filters
+	hr = CoCreateInstance(save ? &CLSID_FileSaveDialog : &CLSID_FileOpenDialog, NULL, CLSCTX_INPROC,
-		IFileDialog_SetFileTypes(pfd, (UINT)ext->count + 1, filter_spec);
+		&IID_IFileDialog, (LPVOID)&pfd);
 
-		if (path == NULL) {
+	if (FAILED(hr)) {
-			// Try to use the "Downloads" folder as the initial default directory
+		SetLastError(hr);
-			const GUID download_dir_guid =
+		uprintf("CoCreateInstance for FileOpenDialog failed: %s\n", WindowsErrorString());
-				{ 0x374de290, 0x123f, 0x4565, { 0x91, 0x64, 0x39, 0xc4, 0x92, 0x5e, 0x46, 0x7b } };
+		if (pfd != NULL)
-			hr = SHGetKnownFolderPath(&download_dir_guid, 0, 0, &wpath);
+			goto out;
-			if (SUCCEEDED(hr)) {
+	}
-				hr = SHCreateItemFromParsingName(wpath, NULL, &IID_IShellItem, (LPVOID)&si_path);
+
-				if (SUCCEEDED(hr)) {
+	// Set the file extension filters
-					IFileDialog_SetDefaultFolder(pfd, si_path);
+	IFileDialog_SetFileTypes(pfd, (UINT)ext->count + 1, filter_spec);
-				}
+
-				CoTaskMemFree(wpath);
+	if (path == NULL) {
-			}
+		// Try to use the "Downloads" folder as the initial default directory
-		} else {
+		const GUID download_dir_guid =
-			wpath = utf8_to_wchar(path);
+			{ 0x374de290, 0x123f, 0x4565, { 0x91, 0x64, 0x39, 0xc4, 0x92, 0x5e, 0x46, 0x7b } };
+		hr = SHGetKnownFolderPath(&download_dir_guid, 0, 0, &wpath);
+		if (SUCCEEDED(hr)) {
 			hr = SHCreateItemFromParsingName(wpath, NULL, &IID_IShellItem, (LPVOID)&si_path);
 			if (SUCCEEDED(hr)) {
-				IFileDialog_SetFolder(pfd, si_path);
+				IFileDialog_SetDefaultFolder(pfd, si_path);
 			}
-			safe_free(wpath);
+			CoTaskMemFree(wpath);
 		}
-
+	} else {
-		// Set the default filename
+		wpath = utf8_to_wchar(path);
-		wfilename = utf8_to_wchar((ext->filename == NULL) ? "" : ext->filename);
+		hr = SHCreateItemFromParsingName(wpath, NULL, &IID_IShellItem, (LPVOID)&si_path);
-		if (wfilename != NULL) {
-			IFileDialog_SetFileName(pfd, wfilename);
-		}
-		// Set a default extension so that when the user switches filters it gets
-		// automatically updated. Note that the IFileDialog::SetDefaultExtension()
-		// doc says the extension shouldn't be prefixed with unwanted characters
-		// but it appears to work regardless so we don't bother cleaning it.
-		wext = utf8_to_wchar((ext->extension == NULL) ? "" : ext->extension[0]);
-		if (wext != NULL) {
-			IFileDialog_SetDefaultExtension(pfd, wext);
-		}
-
-		// Display the dialog
-		hr = IFileDialog_Show(pfd, hMainDialog);
-
-		// Cleanup
-		safe_free(wext);
-		safe_free(wfilename);
-		for (i = 0; i < ext->count; i++) {
-			safe_free(filter_spec[i].pszSpec);
-			safe_free(filter_spec[i].pszName);
-		}
-		safe_free(filter_spec[i].pszName);
-		safe_free(filter_spec);
-
 		if (SUCCEEDED(hr)) {
-			// Obtain the result of the user's interaction with the dialog.
+			IFileDialog_SetFolder(pfd, si_path);
-			hr = IFileDialog_GetResult(pfd, &psiResult);
-			if (SUCCEEDED(hr)) {
-				hr = IShellItem_GetDisplayName(psiResult, SIGDN_FILESYSPATH, &wpath);
-				if (SUCCEEDED(hr)) {
-					filepath = wchar_to_utf8(wpath);
-					CoTaskMemFree(wpath);
-				} else {
-					SetLastError(hr);
-					uprintf("Unable to access file path: %s\n", WindowsErrorString());
-				}
-				IShellItem_Release(psiResult);
-			}
-		} else if ((hr & 0xFFFF) != ERROR_CANCELLED) {
-			// If it's not a user cancel, assume the dialog didn't show and fallback
-			SetLastError(hr);
-			uprintf("Could not show FileOpenDialog: %s\n", WindowsErrorString());
-			goto fallback;
 		}
-		IFileDialog_Release(pfd);
+		safe_free(wpath);
-		dialog_showing--;
-		return filepath;
 	}
 
-fallback:
+	// Set the default filename
+	wfilename = utf8_to_wchar((ext->filename == NULL) ? "" : ext->filename);
+	if (wfilename != NULL)
+		IFileDialog_SetFileName(pfd, wfilename);
+	// Set a default extension so that when the user switches filters it gets
+	// automatically updated. Note that the IFileDialog::SetDefaultExtension()
+	// doc says the extension shouldn't be prefixed with unwanted characters
+	// but it appears to work regardless so we don't bother cleaning it.
+	wext = utf8_to_wchar((ext->extension == NULL) ? "" : ext->extension[0]);
+	if (wext != NULL)
+		IFileDialog_SetDefaultExtension(pfd, wext);
+	// Set the current selected extension
+	IFileDialog_SetFileTypeIndex(pfd, selected_ext == NULL ? 0 : *selected_ext);
+
+	// Display the dialog and (optionally) get the selected extension index
+	hr = IFileDialog_Show(pfd, hMainDialog);
+	if (selected_ext != NULL)
+		IFileDialog_GetFileTypeIndex(pfd, selected_ext);
+
+	// Cleanup
+	safe_free(wext);
+	safe_free(wfilename);
+	for (i = 0; i < ext->count; i++) {
+		safe_free(filter_spec[i].pszSpec);
+		safe_free(filter_spec[i].pszName);
+	}
+	safe_free(filter_spec[i].pszName);
 	safe_free(filter_spec);
-	if (pfd != NULL) {
+
-		IFileDialog_Release(pfd);
+	if (SUCCEEDED(hr)) {
+		// Obtain the result of the user's interaction with the dialog.
+		hr = IFileDialog_GetResult(pfd, &psiResult);
+		if (SUCCEEDED(hr)) {
+			hr = IShellItem_GetDisplayName(psiResult, SIGDN_FILESYSPATH, &wpath);
+			if (SUCCEEDED(hr)) {
+				filepath = wchar_to_utf8(wpath);
+				CoTaskMemFree(wpath);
+			} else {
+				SetLastError(hr);
+				uprintf("Unable to access file path: %s", WindowsErrorString());
+			}
+			IShellItem_Release(psiResult);
+		}
+	} else if ((hr & 0xFFFF) != ERROR_CANCELLED) {
+		// If it's not a user cancel, assume the dialog didn't show and fallback
+		SetLastError(hr);
+		uprintf("Could not show FileOpenDialog: %s", WindowsErrorString());
 	}
 
-	memset(&ofn, 0, sizeof(ofn));
+out:
-	ofn.lStructSize = sizeof(ofn);
+	if (pfd != NULL)
-	ofn.hwndOwner = hMainDialog;
+		IFileDialog_Release(pfd);
-	// Selected File name
-	static_sprintf(selected_name, "%s", (ext->filename == NULL)?"":ext->filename);
-	ofn.lpstrFile = selected_name;
-	ofn.nMaxFile = MAX_PATH;
-	// Set the file extension filters
-	all_files = lmprintf(MSG_107);
-	ext_strlen = 0;
-	for (i=0; i<ext->count; i++) {
-		ext_strlen += safe_strlen(ext->description[i]) + 2*safe_strlen(ext->extension[i]) + sizeof(" ()\r\r");
-	}
-	ext_strlen += safe_strlen(all_files) + sizeof(" (*.*)\r*.*\r");
-	ext_string = (char*)malloc(ext_strlen+1);
-	if (ext_string == NULL)
-		return NULL;
-	ext_string[0] = 0;
-	for (i=0, j=0; i<ext->count; i++) {
-		j += _snprintf(&ext_string[j], ext_strlen-j, "%s (%s)\r%s\r", ext->description[i], ext->extension[i], ext->extension[i]);
-	}
-	j = _snprintf(&ext_string[j], ext_strlen-j, "%s (*.*)\r*.*\r", all_files);
-	// Microsoft could really have picked a better delimiter!
-	for (i=0; i<ext_strlen; i++) {
-// Since the VS Code Analysis tool is dumb...
-#if defined(_MSC_VER)
-#pragma warning(suppress: 6385)
-#endif
-		if (ext_string[i] == '\r') {
-#if defined(_MSC_VER)
-#pragma warning(suppress: 6386)
-#endif
-			ext_string[i] = 0;
-		}
-	}
-	ofn.lpstrFilter = ext_string;
-	ofn.nFilterIndex = 1;
-	ofn.lpstrInitialDir = path;
-	ofn.Flags = OFN_OVERWRITEPROMPT | options;
-	// Show Dialog
-	if (save) {
-		r = GetSaveFileNameU(&ofn);
-	} else {
-		r = GetOpenFileNameU(&ofn);
-	}
-	if (r) {
-		filepath = safe_strdup(selected_name);
-	} else {
-		tmp = CommDlgExtendedError();
-		if (tmp != 0) {
-			uprintf("Could not select file for %s. Error %X\n", save?"save":"open", tmp);
-		}
-	}
-	safe_free(ext_string);
 	dialog_showing--;
 	return filepath;
 }
@@ -1700,7 +1635,7 @@ INT_PTR CALLBACK NewVersionCallback(HWND hDlg, UINT message, WPARAM wParam, LPAR
 					break;
 				}
 				dl_ext.filename = PathFindFileNameU(update.download_url);
-				filepath = FileDialog(TRUE, app_dir, &dl_ext, OFN_NOCHANGEDIR);
+				filepath = FileDialog(TRUE, app_dir, &dl_ext, NULL);
 				if (filepath == NULL) {
 					uprintf("Could not get save path");
 					break;

src/vhd.c

@@ -29,6 +29,7 @@
 #include "vhd.h"
 #include "missing.h"
 #include "resource.h"
+#include "settings.h"
 #include "msapi_utf8.h"
 
 #include "drive.h"
@@ -58,6 +59,7 @@ typedef struct {
 uint32_t wim_nb_files, wim_proc_files, wim_extra_files;
 HANDLE wim_thread = NULL;
 extern int default_thread_priority;
+extern char* save_image_type;
 extern BOOL ignore_boot_marker, has_ffu_support;
 extern RUFUS_DRIVE rufus_drive[MAX_DRIVES];
 extern HANDLE format_thread;
@@ -1099,68 +1101,79 @@ static DWORD WINAPI FfuSaveImageThread(void* param)
 
 void VhdSaveImage(void)
 {
-	static IMG_SAVE img_save = { 0 };
+	UINT i;
+	static IMG_SAVE img_save;
 	char filename[128];
 	char path[MAX_PATH];
 	int DriveIndex = ComboBox_GetCurSel(hDeviceList);
-	EXT_DECL(img_ext, filename, __VA_GROUP__("*.vhdx", "*.vhd", "*.ffu"),
+	static EXT_DECL(img_ext, filename, __VA_GROUP__("*.vhd", "*.vhdx", "*.ffu"),
-		__VA_GROUP__(lmprintf(MSG_342), lmprintf(MSG_343), lmprintf(MSG_344)));
+		__VA_GROUP__(lmprintf(MSG_343), lmprintf(MSG_342), lmprintf(MSG_344)));
 	ULARGE_INTEGER free_space;
 
+	memset(&img_save, 0, sizeof(IMG_SAVE));
 	if ((DriveIndex < 0) || (format_thread != NULL))
 		return;
 
-	static_sprintf(filename, "%s.vhdx", rufus_drive[DriveIndex].label);
+	static_sprintf(filename, "%s", rufus_drive[DriveIndex].label);
 	img_save.DeviceNum = (DWORD)ComboBox_GetItemData(hDeviceList, DriveIndex);
 	img_save.DevicePath = GetPhysicalName(img_save.DeviceNum);
 	// FFU support requires GPT
 	if (!has_ffu_support || SelectedDrive.PartitionStyle != PARTITION_STYLE_GPT)
 		img_ext.count = 2;
-	img_save.ImagePath = FileDialog(TRUE, NULL, &img_ext, 0);
+	for (i = 1; i <= (UINT)img_ext.count && (safe_strcmp(&_img_ext_x[i - 1][2], save_image_type) != 0); i++);
-	img_save.Type = VIRTUAL_STORAGE_TYPE_DEVICE_VHD;
+	if (i > (UINT)img_ext.count)
-	if (safe_strstr(img_save.ImagePath, ".vhdx") != NULL)
+		i = 2;
+	img_save.ImagePath = FileDialog(TRUE, NULL, &img_ext, &i);
+	assert(i > 0 && i <= (UINT)img_ext.count);
+	save_image_type = (char*) &_img_ext_x[i - 1][2];
+	WriteSettingStr(SETTING_PREFERRED_SAVE_IMAGE_TYPE, save_image_type);
+	switch (i) {
+	case 1:
 		img_save.Type = VIRTUAL_STORAGE_TYPE_DEVICE_VHD;
-	else if (safe_strstr(img_save.ImagePath, ".ffu") != NULL)
+		break;
+	case 3:
 		img_save.Type = VIRTUAL_STORAGE_TYPE_DEVICE_FFU;
+		break;
+	default:
+		img_save.Type = VIRTUAL_STORAGE_TYPE_DEVICE_VHDX;
+		break;
+	}
 	img_save.BufSize = DD_BUFFER_SIZE;
 	img_save.DeviceSize = SelectedDrive.DiskSize;
 	if (img_save.DevicePath != NULL && img_save.ImagePath != NULL) {
 		// Reset all progress bars
 		SendMessage(hMainDialog, UM_PROGRESS_INIT, 0, 0);
 		FormatStatus = 0;
-		free_space.QuadPart = 0;
+		if (img_save.Type == VIRTUAL_STORAGE_TYPE_DEVICE_VHD) {
-		if ((GetVolumePathNameA(img_save.ImagePath, path, sizeof(path)))
+			free_space.QuadPart = 0;
-			&& (GetDiskFreeSpaceExA(path, &free_space, NULL, NULL))
+			if ((GetVolumePathNameA(img_save.ImagePath, path, sizeof(path)))
-			&& ((LONGLONG)free_space.QuadPart > (SelectedDrive.DiskSize + 512))) {
+				&& (GetDiskFreeSpaceExA(path, &free_space, NULL, NULL))
-			// Disable all controls except Cancel
+				&& ((LONGLONG)free_space.QuadPart < (SelectedDrive.DiskSize + 512))) {
-			EnableControls(FALSE, FALSE);
-			FormatStatus = 0;
-			InitProgress(TRUE);
-			format_thread = CreateThread(NULL, 0, img_save.Type == VIRTUAL_STORAGE_TYPE_DEVICE_FFU ?
-				FfuSaveImageThread : VhdSaveImageThread, &img_save, 0, NULL);
-			if (format_thread != NULL) {
-				uprintf("\r\nSave to VHD operation started");
-				PrintInfo(0, -1);
-				SendMessage(hMainDialog, UM_TIMER_START, 0, 0);
-			} else {
-				uprintf("Unable to start VHD save thread");
-				FormatStatus = ERROR_SEVERITY_ERROR | FAC(FACILITY_STORAGE) | APPERR(ERROR_CANT_START_THREAD);
-				safe_free(img_save.DevicePath);
-				safe_free(img_save.ImagePath);
-				PostMessage(hMainDialog, UM_FORMAT_COMPLETED, (WPARAM)FALSE, 0);
-			}
-		} else {
-			if (free_space.QuadPart == 0) {
-				uprintf("Unable to isolate drive name for VHD save");
-				FormatStatus = ERROR_SEVERITY_ERROR | FAC(FACILITY_STORAGE) | ERROR_PATH_NOT_FOUND;
-			} else {
-				// TODO: Might be salvageable for compressed VHDX
 				uprintf("The VHD size is too large for the target drive");
 				FormatStatus = ERROR_SEVERITY_ERROR | FAC(FACILITY_STORAGE) | ERROR_FILE_TOO_LARGE;
+				PostMessage(hMainDialog, UM_FORMAT_COMPLETED, (WPARAM)FALSE, 0);
+				goto out;
 			}
-			safe_free(img_save.DevicePath);
+		}
-			safe_free(img_save.ImagePath);
+		// Disable all controls except Cancel
+		EnableControls(FALSE, FALSE);
+		FormatStatus = 0;
+		InitProgress(TRUE);
+		format_thread = CreateThread(NULL, 0, img_save.Type == VIRTUAL_STORAGE_TYPE_DEVICE_FFU ?
+			FfuSaveImageThread : VhdSaveImageThread, &img_save, 0, NULL);
+		if (format_thread != NULL) {
+			uprintf("\r\nSave to VHD operation started");
+			PrintInfo(0, -1);
+			SendMessage(hMainDialog, UM_TIMER_START, 0, 0);
+		} else {
+			uprintf("Unable to start VHD save thread");
+			FormatStatus = ERROR_SEVERITY_ERROR | FAC(FACILITY_STORAGE) | APPERR(ERROR_CANT_START_THREAD);
 			PostMessage(hMainDialog, UM_FORMAT_COMPLETED, (WPARAM)FALSE, 0);
 		}
 	}
+out:
+	if (format_thread == NULL) {
+		safe_free(img_save.DevicePath);
+		safe_free(img_save.ImagePath);
+	}
 }