Do not block CBN_EDITCHANGE for WM_PASTE or WM_CUT with the
NOEDITNOTIFY flag, as these msgs can come directly from the app to the
combo wndproc.

controls/combo.c

diff --git a/controls/combo.c b/controls/combo.c
index 7a24964..9be52c4 100644
--- a/controls/combo.c
+++ b/controls/combo.c
@@ -1873,9 +1873,6 @@
 	case WM_SETTEXT:
 	case WM_GETTEXTLENGTH:
 	case WM_CLEAR:
-	case WM_CUT:
-        case WM_PASTE:
-	case WM_COPY:
                 if ((message == WM_GETTEXTLENGTH) && !ISWIN31 && !(lphc->wState & CBF_EDIT))
                 {
                 int j = SendMessageA( lphc->hWndLBox, LB_GETCURSEL, 0, 0 );
@@ -1891,6 +1888,12 @@
 		    return ret;
 		}
 		else return  CB_ERR;
+	case WM_CUT:
+        case WM_PASTE:
+	case WM_COPY:
+		if( lphc->wState & CBF_EDIT ) 
+		    return SendMessageA( lphc->hWndEdit, message, wParam, lParam );
+		else return  CB_ERR;
 
 	case WM_DRAWITEM:
 	case WM_DELETEITEM: