comctl32: Don't print ERRs for reflected messages.
diff --git a/dlls/comctl32/commctrl.c b/dlls/comctl32/commctrl.c
index 1863dbf..050a018 100644
--- a/dlls/comctl32/commctrl.c
+++ b/dlls/comctl32/commctrl.c
@@ -1572,6 +1572,50 @@
ReleaseDC(NULL, hdc);
}
+#ifndef OCM__BASE /* avoid including olectl.h */
+#define OCM__BASE (WM_USER+0x1c00)
+#endif
+
+/***********************************************************************
+ * COMCTL32_IsReflectedMessage [internal]
+ *
+ * Some parents reflect notify messages - for some messages sent by the child,
+ * they send it back with the message code increased by OCM__BASE (0x2000).
+ * This allows better subclassing of controls. We don't need to handle such
+ * messages but we don't want to print ERRs for them, so this helper function
+ * identifies them.
+ *
+ * Some of the codes are in the CCM_FIRST..CCM_LAST range, but there is no
+ * colision with defined CCM_ codes.
+ */
+BOOL COMCTL32_IsReflectedMessage(UINT uMsg)
+{
+ switch (uMsg)
+ {
+ case OCM__BASE + WM_COMMAND:
+ case OCM__BASE + WM_CTLCOLORBTN:
+ case OCM__BASE + WM_CTLCOLOREDIT:
+ case OCM__BASE + WM_CTLCOLORDLG:
+ case OCM__BASE + WM_CTLCOLORLISTBOX:
+ case OCM__BASE + WM_CTLCOLORMSGBOX:
+ case OCM__BASE + WM_CTLCOLORSCROLLBAR:
+ case OCM__BASE + WM_CTLCOLORSTATIC:
+ case OCM__BASE + WM_DRAWITEM:
+ case OCM__BASE + WM_MEASUREITEM:
+ case OCM__BASE + WM_DELETEITEM:
+ case OCM__BASE + WM_VKEYTOITEM:
+ case OCM__BASE + WM_CHARTOITEM:
+ case OCM__BASE + WM_COMPAREITEM:
+ case OCM__BASE + WM_HSCROLL:
+ case OCM__BASE + WM_VSCROLL:
+ case OCM__BASE + WM_PARENTNOTIFY:
+ case OCM__BASE + WM_NOTIFY:
+ return TRUE;
+ default:
+ return FALSE;
+ }
+}
+
/***********************************************************************
* MirrorIcon [COMCTL32.414]
*
