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For what reason? You first need to diagnose what is happening in your code to cause the error. When you enter the critical section what are you trying to synchronise with?
void CVersion::ReadValue(BYTE *Buffer, int n_Length, int n_Source)
m_svalue = tempBuffer;
You are setting m_svalue to point to tempBuffer, but as soon as you exit this function that buffer will get released so the pointer is no longer valid. Looking at this code again I cannot see what useful purpose it serves.
I assume this is a threading problem. The code can probably be called from different threads (that's why you use a Critical Section), but the control text can only be set from the GUI thread.
The easiest way to achieve this is using a timer. So in the ReadValue() fucntion you only put the data into m_svalue. And in the OnTimer() function (which runs in GUI thread) you call Data(). This would of cource mean that you need to store the most recently used CClassVersion object somewhere.
The good thing about pessimism is, that you are always either right or pleasently surprised.
No, my function is not a Unicode function. my file path is C:\Downloads\HornSound.wav.
I found if I added the following " MessageBox(NULL, loct, "Message1", NULL); " before "CloseHandle(hThread);".
Both MessageBoxes (both in the function and in the thread) can correctly display the file path.
But if I removed "MessageBox" in the function, then the MessageBox in the thread cannot correctly display the file path. What is the problem?
The fact that it works when you add a delay suggests that the file path buffer is getting destroyed before the thread process has constructed the message box. You should ensure the buffer is preserved until the thread has finished using it, by some form of synchronisation. Or better still don't use threads unless they are serving some necessary function.
c in case a global time step is reqd. eg. time accurate problems
No, I mean what is the programming problem? Telling us what you want to do does not give enough information about where you are stuck or what you have tried. If you know the mathematics of the problem then converting that into C++ code should not be too difficult.
Once again you are expecting us to guess what is happening; we cannot see your screen or read your mind. Please edit your message, add <pre> tags around your code to make it readable, and explain exactly what the problem is and where it occurs.
Last Visit: 31-Dec-99 19:00 Last Update: 2-Mar-15 17:56