Thread: ShowWindow causing Access Violations - please help

I'm trying to write a WIN32 API C++ wrapper (and I'm new to WIN32 programming but I think I understand the concepts fairly well), and I'm hitting a problem with the ShowWindow(HWND hWnd, int nShowCmd) function. I've read several articles and tutorials on the API and making wrapper classes for it, but I've seen no mention of this. The window structure is being properly filled out, the window is being registered and it is being created. But when I call ShowWindow, it craps out - the window appears (slowly) but is busy and not responding. According to the MSVC++ 6.0 debugger, an access violation is being cause when ShowWindow is called. Any help would be greatly appreciated, as this problem is a major show stopper.

Below is the code for my show window method (at the very bottom) and the window creation method. The window handle, hWnd, is a protected member of the class. AddErrorMessage is an inherited method for posting error messages to a queue so they can be written to a file later. The class is modeled off of several examples I have.



bool WindowClass::WindowCreate(HINSTANCE hInstance, char *title, int x, int y, int width, int height, unsigned long classStyle, unsigned long windowStyle)
{
WNDCLASS window;

/* Configure Window Structure */
window.style = classStyle;
window.lpfnWndProc = WindowProc;
window.cbClsExtra = 0;
window.cbWndExtra = 0;
window.hInstance = hInstance;
window.hIcon = LoadIcon(hInstance, IDI_APPLICATION);
window.hCursor = LoadCursor (NULL, IDC_ARROW);
window.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
window.lpszMenuName = NULL;
window.lpszClassName = title;

/* Register Window*/
if(!RegisterClass(&window))
{
int error = GetLastError();
AddErrorMessage("Unable to register window", "WindowCreate", "WindowClass", __FILE__, __LINE__);
return false;
}

/* Create Window and Assign Handle */
hWnd = CreateWindow(title, title, windowStyle, x, y, width, height, NULL, NULL, hInstance, (void*)this);
if(hWnd != NULL)
{
windowStatus = WINDOW_ALIVE;
return true;
}
else
{
windowStatus = WINDOW_NOT_CREATED;
AddErrorMessage("Unable to create window", "WindowCreate", "WindowClass", __FILE__, __LINE__);
return false;
}

}


void WindowClass::WindowShow(int nShowCmd)
{
if(hWnd != NULL)
{
ShowWindow(hWnd, nShowCmd); // THIS IS THE PROBLEM!
UpdateWindow(hWnd);
}
}

Thanks!