On Jul 9, 6:43 pm, Joseph M. Newcomer <newco...@flounder.com> wrote:
The answer is simple: don't do that. It is not supported, and it won't work. You cannot
manipulate a window safely from a thread other than its owner, so it is no surprise when a
method that involves windows fails when invoked from some other thread. This is expected,
and you should not under any circumstances be manipulating any aspect of a window from a
secondary thread.
joe
On Wed, 9 Jul 2008 01:39:50 -0700 (PDT), Faisal <faisal...@gmail.com> wrote:
Hi,
In my application, I use SaveBarState() for persisting control bar
state.
The code fragment is something like this.
void CMainFrame::OnSavePersistance()
{
SaveBarState(_T("My Persistence"));
// Saves some information to an xml file
}
Since my xml saving takes some time I changed the code to execute in a
thread
UINT ThreadFn(LPVOID pParam)
{
CMainFrame* pThis = (CMainFrame*)pParam;
pThis->SaveBarState(_T("My Persistence"));
return 0;
}
void CMainFrame::OnCntrlbartst()
{
AfxBeginThread( ThreadFn, this );
}
But, now in the thread function SaveBarState() fails. It shows some
assertion in debug version. I think it is due to some mismatch in
MODULE_STATE.
statck trace for assert
CWnd::AssertValid() line 879 + 25 bytes
CControlBar::AssertValid() line 976
CStatusBar::AssertValid() line 732
AfxAssertValidObject(const CObject * 0x00431510 {CStatusBar
hWnd=0x00180c7e}, const char * 0x5f4ccfe8 THIS_FILE, int 531) line 108
CControlBar::GetBarInfo(CControlBarInfo * 0x00433d70) line 534
CFrameWnd::GetDockState(CDockState & {CDockState}) line 520
CFrameWnd::SaveBarState(const char * 0x0041844c `string') line 443
ThreadFn(void * 0x00431450) line 174
How can I avoid this problem.
Joseph M. Newcomer [MVP]
email: newco...@flounder.com
Web:http://www.flounder.com
MVP Tips:http://www.flounder.com/mvp_tips.htm