[0.4.14][NTUSER][3DTEXT] Squashed backport CORE-17866, CORE-8217

The main part in [USER32] was already committed into 0.4.14-RC-123-g 75e9ac7727
but we do have two follow-ups that are worth picking as well:
---------------------
[NTUSER] Do not remove message from the Msg Queue if it is not for us. (#4129)

CORE-8217 This part of the fix keeps the buttons working (Cancel/Ok/top-Right-X) even under high CPU-load
Patch from 'I_Kill_Bugs' contributor.

Fix picked from 0.4.15-dev-3499-g 7d1b50394b
---------------------
[3DTEXT] Fix 3dtext.scr using near 100% CPU (#4125) CORE-17866, CORE-8217

Fix picked from 0.4.15-dev-3443-g 5c9fdcb1de

base/applications/screensavers/3dtext/3dtext.c

@@ -41,6 +41,9 @@ GLfloat extentY = 0.0f;
 
 HINSTANCE hInstance;
 BOOL fullscreen = FALSE;
+UINT uTimerID;                                          // SetTimer Actual ID
+#define APP_TIMER             1                         // Graphics Update Timer ID
+#define APP_TIMER_INTERVAL    (USER_TIMER_MINIMUM * 5)  // Graphics Update Interval
 
 // Build Our Bitmap Font
 GLvoid BuildFont(GLvoid)
@@ -181,7 +184,7 @@ GLvoid InitGL(GLsizei Width, GLsizei Height)
 }
 
 // Handles Window Resizing
-GLvoid ReSizeGLScene(GLsizei Width, GLsizei Height)	
+GLvoid ReSizeGLScene(GLsizei Width, GLsizei Height)
 {
     // Is Window Too Small (Divide By Zero Error)
     if (Height == 0)
@@ -338,12 +341,18 @@ ScreenSaverProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
 
             // Initialize The GL Screen Using Screen Info
             InitGL(Screen.right, Screen.bottom);
+
+            // Create Graphics update timer
+            uTimerID = SetTimer(hWnd, APP_TIMER, APP_TIMER_INTERVAL, NULL);
             break;
 
         case WM_DESTROY:
             // Disable Fullscreen Mode
             ChangeDisplaySettings(NULL, 0);
 
+            // Delete the Update Timer
+            KillTimer(hWnd, uTimerID);
+
             // Deletes The Font Display List
             KillFont();
 
@@ -360,6 +369,8 @@ ScreenSaverProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
         case WM_PAINT:
             DrawGLScene();
             SwapBuffers(hDC);
+            // Mark this window as updated, so the OS won't ask us to update it again.
+            ValidateRect(hWnd, NULL);
             break;
 
         case WM_SIZE: // Resizing The Screen
@@ -367,6 +378,11 @@ ScreenSaverProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
             ReSizeGLScene(LOWORD(lParam), HIWORD(lParam));
             break;
 
+        case WM_TIMER:
+            // Used to update graphic based on timer udpate interval
+            InvalidateRect(hWnd, NULL, TRUE);
+            break;
+
         default:
             // Pass Windows Messages to the default screensaver window procedure
             return DefScreenSaverProc(hWnd, message, wParam, lParam);

win32ss/user/ntuser/msgqueue.c

@@ -1524,7 +1524,7 @@ BOOL co_IntProcessMouseMessage(MSG* msg, BOOL* RemoveMessages, BOOL* NotForUs, L
     {
         // This is not for us and we should leave so the other thread can check for messages!!!
         *NotForUs = TRUE;
-        *RemoveMessages = TRUE;
+        *RemoveMessages = FALSE;
         return FALSE;
     }