help

Hi, everyone,
I got mad with this error. The program runs fine untill I hit a button to create an object with a new thread, a pop up window report that this program has encountered problem, need to close.
Who can help me?
Thanks

'RoadNetworkViewerd.exe': Loaded 'C:\WINDOWS\system32\ntdll.dll', No symbols loaded.
'RoadNetworkViewerd.exe': Loaded 'C:\WINDOWS\system32\kernel32.dll', No symbols loaded.
'RoadNetworkViewerd.exe': Loaded 'C:\WINDOWS\system32\opengl32.dll', No symbols loaded.
'RoadNetworkViewerd.exe': Loaded 'C:\WINDOWS\system32\msvcrt.dll', No symbols loaded.
'RoadNetworkViewerd.exe': Loaded 'C:\WINDOWS\system32\advapi32.dll', No symbols loaded.
'RoadNetworkViewerd.exe': Loaded 'C:\WINDOWS\system32\rpcrt4.dll', No symbols loaded.
'RoadNetworkViewerd.exe': Loaded 'C:\WINDOWS\system32\gdi32.dll', No symbols loaded.
'RoadNetworkViewerd.exe': Loaded 'C:\WINDOWS\system32\user32.dll', No symbols loaded.
'RoadNetworkViewerd.exe': Loaded 'C:\WINDOWS\system32\glu32.dll', No symbols loaded.
'RoadNetworkViewerd.exe': Loaded 'C:\WINDOWS\system32\ddraw.dll', No symbols loaded.
'RoadNetworkViewerd.exe': Loaded 'C:\WINDOWS\system32\dciman32.dll', No symbols loaded.
'C:\WINDOWS\system32\winmm.dll', No symbols loaded.
'RoadNetworkViewerd.exe': Loaded 'C:\WINDOWS\system32\msvcp71d.dll', Symbols loaded.
'RoadNetworkViewerd.exe': Loaded 'C:\WINDOWS\system32\msvcr71d.dll', Symbols loaded.
...
'RoadNetworkViewerd.exe': Loaded 'C:\WINDOWS\system32\netapi32.dll', No symbols loaded.
The thread 'Win32 Thread' (0x808) has exited with code 0 (0x0).
Unhandled exception at 0x1048711a (msvcp71d.dll) in RoadNetworkViewerd.exe: 0xC0000005: Access violation reading location 0x8b8ecc33.
The program '[3420] RoadNetworkViewerd.exe: Native' has exited with code 0 (0x0).

Which program is it that encounters the error, your program or the compiler? If it's the compiler you might not be able to find a solution here.

>> RoadNetworkViewerd.exe: 0xC0000005: Access violation reading location 0x8b8ecc33
That's your problem right there. Just run it in the debugger. When the exception occurs, view the call stack to see where in your code the exception is occuring.

gg