ReleaseCapture should return TRUE.

dlls/user/input.c

@@ -183,7 +183,19 @@ HWND WINAPI SetCapture( HWND hwnd )
  */
 BOOL WINAPI ReleaseCapture(void)
 {
-    return (SetCapture(0) != 0);
+    BOOL ret;
+    HWND previous = 0;
+
+    SERVER_START_REQ( set_capture_window )
+    {
+        req->handle = 0;
+        req->flags  = 0;
+        if ((ret = !wine_server_call_err( req ))) previous = reply->previous;
+    }
+    SERVER_END_REQ;
+
+    if (previous) SendMessageW( previous, WM_CAPTURECHANGED, 0, 0 );
+    return ret;
 }
 
 

dlls/user/tests/win.c

@@ -2173,6 +2173,8 @@ static void test_capture_2(void)
 
 static void test_capture_3(HWND hwnd1, HWND hwnd2)
 {
+    BOOL ret;
+
     ShowWindow(hwnd1, SW_HIDE);
     ShowWindow(hwnd2, SW_HIDE);
 
@@ -2188,7 +2190,10 @@ static void test_capture_3(HWND hwnd1, HWND hwnd2)
     ShowWindow(hwnd1, SW_SHOW);
     check_wnd_state(hwnd1, hwnd1, hwnd1, hwnd2);
 
-    ReleaseCapture();
+    ret = ReleaseCapture();
+    ok (ret, "releasecapture did not return TRUE.\n");
+    ret = ReleaseCapture();
+    ok (ret, "releasecapture did not return TRUE after second try.\n");
 }
 
 static void test_keyboard_input(HWND hwnd)