Add hint to optionally forcibly raise the window under MS Windows.

include/SDL_hints.h

@@ -412,6 +412,19 @@ extern "C" {
  */
 #define SDL_HINT_EVENT_LOGGING   "SDL_EVENT_LOGGING"
 
+/**
+ *  \brief  A variable controlling whether raising the window should be done more forcefully
+ *
+ *  This variable can be set to the following values:
+ *    "0"       - No forcing (the default)
+ *    "1"       - Extra level of forcing
+ *
+ *  At present, this is only an issue under MS Windows, which makes it nearly impossible to
+ *  programmatically move a window to the foreground, for "security" reasons. See
+ *  http://stackoverflow.com/a/34414846 for a discussion.
+ */
+#define SDL_HINT_FORCE_RAISEWINDOW    "SDL_HINT_FORCE_RAISEWINDOW"
+
 /**
  *  \brief  A variable controlling how 3D acceleration is used to accelerate the SDL screen surface.
  *

src/video/windows/SDL_windowswindow.c

@@ -573,8 +573,38 @@ WIN_HideWindow(_THIS, SDL_Window * window)
 void
 WIN_RaiseWindow(_THIS, SDL_Window * window)
 {
+    /* If desired, raise the window more forcefully.
+     * Technique taken from http://stackoverflow.com/questions/916259/ .
+     * Specifically, http://stackoverflow.com/a/34414846 .
+     *
+     * The issue is that Microsoft has gone through a lot of trouble to make it
+     * nearly impossible to programmatically move a window to the foreground,
+     * for "security" reasons. Apparently, the following song-and-dance gets
+     * around their objections. */
+    SDL_bool bForce = SDL_GetHintBoolean(SDL_HINT_FORCE_RAISEWINDOW, SDL_FALSE);
+
+    HWND hCurWnd = NULL;
+    DWORD dwMyID = 0u;
+    DWORD dwCurID = 0u;
+
     HWND hwnd = ((SDL_WindowData *) window->driverdata)->hwnd;
+    if(bForce)
+    {
+        hCurWnd = GetForegroundWindow();
+        dwMyID = GetCurrentThreadId();
+        dwCurID = GetWindowThreadProcessId(hCurWnd, NULL);
+        ShowWindow(hwnd, SW_RESTORE);
+        AttachThreadInput(dwCurID, dwMyID, TRUE);
+        SetWindowPos(hwnd, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE);
+        SetWindowPos(hwnd, HWND_NOTOPMOST, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE);
+    }
     SetForegroundWindow(hwnd);
+    if (bForce)
+    {
+        AttachThreadInput(dwCurID, dwMyID, FALSE);
+        SetFocus(hwnd);
+        SetActiveWindow(hwnd);
+    }
 }
 
 void