Add hint for blocking win key when using raw keyboard

Author: expikr

include/SDL3/SDL_hints.h

@@ -4128,6 +4128,20 @@ extern "C" {
  */
 #define SDL_HINT_WINDOWS_RAW_KEYBOARD "SDL_WINDOWS_RAW_KEYBOARD"
 
+/**
+ * A variable controlling whether to block hotkeys when raw keyboard events are enabled.
+ *
+ * The variable can be set to the following values:
+ *
+ * - "0": Hotkeys are not blocked. (default)
+ * - "1": Hotkeys are blocked.
+ *
+ * This hint must be set before SDL is initialized.
+ *
+ * \since This hint is available since SDL 3.2.16.
+ */
+#define SDL_HINT_WINDOWS_RAW_KEYBOARD_NOHOTKEY "SDL_WINDOWS_RAW_KEYBOARD_NOHOTKEY"
+
 /**
  * A variable controlling whether SDL uses Kernel Semaphores on Windows.
  *

src/video/windows/SDL_windowsrawinput.c

@@ -77,7 +77,7 @@ static DWORD WINAPI WIN_RawInputThread(LPVOID param)
     if (data->flags & ENABLE_RAW_KEYBOARD_INPUT) {
         devices[count].usUsagePage = USB_USAGEPAGE_GENERIC_DESKTOP;
         devices[count].usUsage = USB_USAGE_GENERIC_KEYBOARD;
-        devices[count].dwFlags = 0;
+        devices[count].dwFlags = SDL_GetHintBoolean(SDL_HINT_WINDOWS_RAW_KEYBOARD_NOHOTKEY) ? 0x200 : 0;
         devices[count].hwndTarget = window;
         ++count;
     }