WNT: check result of PostMessage()

... so the next time something overflows the main thread's message queue
it's easier to debug.

Change-Id: I90a35e46f3b2cab190c7da5e53024ec549159ac6

2 files changed, 8 insertions, 4 deletions

diff --git a/fpicker/source/win32/filepicker/WinFileOpenImpl.cxx b/fpicker/source/win32/filepicker/WinFileOpenImpl.cxx
index 91720ea71253..1c8e432dde34 100644
--- a/fpicker/source/win32/filepicker/WinFileOpenImpl.cxx
+++ b/fpicker/source/win32/filepicker/WinFileOpenImpl.cxx
@@ -416,11 +416,12 @@ void SAL_CALL CWinFileOpenImpl::cancel()
     {
         // simulate a mouse click to the
         // cancel button
-        PostMessage(
+        BOOL const ret = PostMessage(
             m_hwndFileOpenDlg,
             WM_COMMAND,
             MAKEWPARAM(IDCANCEL,BN_CLICKED),
             (LPARAM)GetDlgItem(m_hwndFileOpenDlg, IDCANCEL));
+        SAL_WARN_IF(0 == ret, "fpicker", "ERROR: PostMessage() failed!");
     }
 }
 
@@ -727,11 +728,12 @@ void SAL_CALL CWinFileOpenImpl::onInitDone()
     m_FilePicker->resumeEventNotification();
 
     //#105996 let vcl know that now a system window is active
-    PostMessage(
+    BOOL const ret = PostMessage(
         HWND_BROADCAST,
         RegisterWindowMessage(TEXT("SYSTEM_WINDOW_ACTIVATED")),
         0,
         0);
+    SAL_WARN_IF(0 == ret, "fpicker", "ERROR: PostMessage() failed!");
 
     // call the parent function to center the
     // dialog to its parent
diff --git a/fpicker/source/win32/folderpicker/MtaFop.cxx b/fpicker/source/win32/folderpicker/MtaFop.cxx
index 78b144bdbf5a..99a436c2859e 100644
--- a/fpicker/source/win32/folderpicker/MtaFop.cxx
+++ b/fpicker/source/win32/folderpicker/MtaFop.cxx
@@ -248,11 +248,12 @@ sal_Bool CMtaFolderPicker::browseForFolder( )
         }
 
         // marshall request into the sta thread
-        PostMessageA(
+        BOOL const ret = PostMessageA(
             m_hwndStaRequestWnd,
             MSG_BROWSEFORFOLDER,
             0,
             reinterpret_cast< LPARAM >( &aReqCtx ) );
+        SAL_WARN_IF(0 == ret, "fpicker", "ERROR: PostMessage() failed!");
 
         // waiting for the event to be signaled or
         // window messages so that we don't block
@@ -350,11 +351,12 @@ void SAL_CALL CMtaFolderPicker::cancel( )
     {
         // simulate a mouse click to the
         // cancel button
-        PostMessageA(
+        BOOL const ret = PostMessageA(
             m_hwnd,
             WM_COMMAND,
             MAKEWPARAM( IDCANCEL, BN_CLICKED ),
             (LPARAM)GetDlgItem( m_hwnd, IDCANCEL ) );
+        SAL_WARN_IF(0 == ret, "fpicker", "ERROR: PostMessage() failed!");
     }
 }