[PATCH v3 2/2] comctl32/treeview: Return from TREEVIEW_LButtonDown when the treeview handle is invalid.

[Jacob Czekalla]

From: Jacob Czekalla

LButtonDown should return when the treeview handle is invalid (e.g. destroyed) after NM_CLICK to prevent further message processing.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=58211
---
 dlls/comctl32/tests/treeview.c | 2 +-
 dlls/comctl32/treeview.c       | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/dlls/comctl32/tests/treeview.c b/dlls/comctl32/tests/treeview.c
index e6f8ca648f4..2708bffb669 100644
--- a/dlls/comctl32/tests/treeview.c
+++ b/dlls/comctl32/tests/treeview.c
@@ -3184,7 +3184,7 @@ static void test_treeview_delete_midclick(void)
     }

flush_events();
-    ok_sequence(sequences, TREEVIEW_SEQ_INDEX, test_click_delete_seq, "treeview click and destroy sequence", TRUE);
+    ok_sequence(sequences, TREEVIEW_SEQ_INDEX, test_click_delete_seq, "treeview click and destroy sequence", FALSE);

SetCursorPos(orig_pos.x, orig_pos.y);
     g_click_delete_test = 0;
diff --git a/dlls/comctl32/treeview.c b/dlls/comctl32/treeview.c
index 073f62c66a2..03fff6bcd7e 100644
--- a/dlls/comctl32/treeview.c
+++ b/dlls/comctl32/treeview.c
@@ -4315,7 +4315,7 @@ TREEVIEW_LButtonDown(TREEVIEW_INFO *infoPtr, LPARAM lParam)
         (ht.flags & TVHT_ONITEMLABEL) && (infoPtr->selectedItem == ht.hItem);

/* Send NM_CLICK right away */
-    if (!do_track && TREEVIEW_SendSimpleNotify(infoPtr, NM_CLICK))
+    if ((!do_track && TREEVIEW_SendSimpleNotify(infoPtr, NM_CLICK)) || !IsWindow(hwnd))
         goto setfocus;

if (ht.flags & TVHT_ONITEMBUTTON)
@@ -4345,7 +4345,7 @@ TREEVIEW_LButtonDown(TREEVIEW_INFO *infoPtr, LPARAM lParam)
         }
     }

-    if (do_track && TREEVIEW_SendSimpleNotify(infoPtr, NM_CLICK))
+    if ((do_track && TREEVIEW_SendSimpleNotify(infoPtr, NM_CLICK)) || !IsWindow(hwnd))
         goto setfocus;

if (TREEVIEW_IsFullRowSelect(infoPtr))