cryptui: Ensure that a destination store is selected in CryptUIWizImport.

dlls/cryptui/cryptui_En.rc

@@ -80,6 +80,7 @@ STRINGTABLE DISCARDABLE
     IDS_IMPORT_BAD_FORMAT "The file format is not recognized.  Please select another file."
     IDS_IMPORT_OPEN_FAILED "Could not open "
     IDS_IMPORT_DEST_DETERMINED "Determined by the program"
+    IDS_IMPORT_SELECT_STORE "Please select a store"
     IDS_PURPOSE_SERVER_AUTH "Ensures the identify of a remote computer"
     IDS_PURPOSE_CLIENT_AUTH "Proves your identity to a remote computer"
     IDS_PURPOSE_CODE_SIGNING "Ensures software came from software publisher\nProtects software from alteration after publication"

dlls/cryptui/cryptuires.h

@@ -77,6 +77,7 @@
 #define IDS_IMPORT_BAD_FORMAT 1057
 #define IDS_IMPORT_OPEN_FAILED 1058
 #define IDS_IMPORT_DEST_DETERMINED 1059
+#define IDS_IMPORT_SELECT_STORE 1060
 
 #define IDS_PURPOSE_SERVER_AUTH 1100
 #define IDS_PURPOSE_CLIENT_AUTH 1101

dlls/cryptui/main.c

@@ -3983,6 +3983,19 @@ static LRESULT CALLBACK import_store_dlg_proc(HWND hwnd, UINT msg, WPARAM wp,
              PSWIZB_BACK | PSWIZB_NEXT);
             ret = TRUE;
             break;
+        case PSN_WIZNEXT:
+        {
+            data = (struct ImportWizData *)GetWindowLongPtrW(hwnd, DWLP_USER);
+            if (IsDlgButtonChecked(hwnd, IDC_IMPORT_SPECIFY_STORE) &&
+             !data->hDestCertStore)
+            {
+                import_warning(data->dwFlags, hwnd, data->pwszWizardTitle,
+                 IDS_IMPORT_SELECT_STORE);
+                SetWindowLongPtrW(hwnd, DWLP_MSGRESULT, 1);
+                ret = 1;
+            }
+            break;
+        }
         }
         break;
     }