WIN_ShowCursor function is now capable of processing NULL as a SDL_Cursor* (repost)

include/SDL3/SDL_hints.h

@@ -4420,11 +4420,29 @@ extern "C" {
  */
 #define SDL_HINT_DEBUG_LOGGING "SDL_DEBUG_LOGGING"
 
+/**
+ * On Windows, this hint forces SDL to call SetCursor(NULL) to hide the mouse cursor,
+ * instead of using an invisible blank cursor.
+ *
+ * This may be required in certain environments (e.g., VMware or specific RDP configurations),
+ * where SetCursorPos() does not function correctly if the cursor is not truly hidden using SetCursor(NULL).
+ *
+ * By default, SDL uses a transparent cursor surface to simulate a hidden cursor,
+ * which avoids issues in some scenarios (e.g., multi-window focus handling).
+ * However, this method may not work properly in all virtualized environments.
+ *
+ * Set this hint to "1" to restore the previous behavior and force SetCursor(NULL) to be used.
+ *
+ * This hint is only applicable on Windows.
+ */
+#define SDL_HINT_WINDOWS_FORCE_NULL_CURSOR "SDL_WINDOWS_FORCE_NULL_CURSOR"
+
 /**
  * An enumeration of hint priorities.
  *
  * \since This enum is available since SDL 3.2.0.
  */
+
 typedef enum SDL_HintPriority
 {
     SDL_HINT_DEFAULT,

src/video/windows/SDL_windowsmouse.c

@@ -434,20 +434,28 @@ static HCURSOR GetCachedCursor(SDL_Cursor *cursor)
 static bool WIN_ShowCursor(SDL_Cursor *cursor)
 {
     if (!cursor) {
-        cursor = SDL_blank_cursor;
+        if (SDL_GetHintBoolean(SDL_HINT_WINDOWS_FORCE_NULL_CURSOR, true)) {
+            SDL_cursor = NULL;
+            SetCursor(NULL);
+
+            return false;
+        } else {
+            cursor = SDL_blank_cursor;
+        }
     }
+
     if (cursor) {
         if (cursor->internal->surface) {
             SDL_cursor = GetCachedCursor(cursor);
         } else {
             SDL_cursor = cursor->internal->cursor;
         }
-    } else {
-        SDL_cursor = NULL;
     }
+
     if (SDL_GetMouseFocus() != NULL) {
         SetCursor(SDL_cursor);
     }
+
     return true;
 }