access violation in WM_PAINT not caught

Question

To test this problem I have written a minimal windows application. If I force an access violation in the WM_PAINT handler this exception never gets to the debug

Answer 1

As a workaround I remove all registered exception handlers in my window procedure. Quite ugly.

LRESULT CALLBACK window_proc( 
    HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
{
    // get thread information block
    NT_TIB* tib;
    __asm {
        mov EAX, FS:[18h]
        mov [tib], EAX
    }
    // old exception handler list
    _EXCEPTION_REGISTRATION_RECORD* old_exception_handler = tib->ExceptionList;
    // remove all exception handler with exception of the default handler
    while( tib->ExceptionList->Next != (_EXCEPTION_REGISTRATION_RECORD*)-1 ) {
        tib->ExceptionList = tib->ExceptionList->Next;
    }

    LRESULT result = DefWindowProc( hwnd, uMsg, wParam, lParam );

    // restore old exception handler
    tib->ExceptionList = old_exception_handler;

    return result;
}