C / C++ / MFC

midiway wrote:

So why can you specify the timeout with CMutex::Lock method, but not in CCriticalSection::Lock?

switch (message)<br />
    {<br />
        case WM_CLOSE:<br />
        MessageBox(NULL, "Are you sure you want to exit?", "Exit", MB_YESNO | MB_ICONEXCLAMATION);<br />
        DestroyWindow(hwnd);<br />
        break;<br />
    }

case WM_CLOSE:
    if (MB_YES == MessageBox(hwnd, _T("Are you sure you want to exit?"), _T("Confirmation"), MB_YESNO))
        DestroyWindow(hwnd);

    return 0;

void CYourClass::OnClose()
{
    if (MB_YES == MessageBox(hwnd, _T("Are you sure you want to exit?"), _T("Confirmation"), MB_YESNO))
        DestroyWindow(hwnd);
}

#include <windows.h><br />
<br />
//Global Definitions<br />
#define WINDOW_WIDTH 1040<br />
#define WINDOW_HEIGHT 750<br />
<br />
//Global Variables<br />
const char lpClassName[] = "My Project";<br />
HWND mainWindow;<br />
<br />
//Function Declarations<br />
LRESULT CALLBACK WindowEvent(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);<br />
<br />
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd)<br />
{<br />
	//Create The Window Class<br />
	WNDCLASSEX wc;<br />
	wc.style = CS_VREDRAW | CS_HREDRAW;<br />
	wc.lpszMenuName = NULL;<br />
	wc.lpszClassName = lpClassName;<br />
	wc.lpfnWndProc = WindowEvent;<br />
	wc.hInstance = hInstance;<br />
	wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION);<br />
	wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);<br />
	wc.hCursor = LoadCursor(NULL, IDC_ARROW);<br />
	wc.hbrBackground = (HBRUSH) GetStockObject(BLACK_BRUSH);<br />
	wc.cbWndExtra = 0;<br />
	wc.cbSize = sizeof(wc);<br />
	wc.cbClsExtra = 0;<br />
<br />
	//Register The Windows Class<br />
	RegisterClassEx(&wc);<br />
<br />
	//Create the Window<br />
	mainWindow = CreateWindowEx(<br />
		NULL,<br />
		lpClassName,<br />
		"My Project",<br />
		WS_OVERLAPPEDWINDOW | WS_VISIBLE,<br />
		(GetSystemMetrics(SM_CXSCREEN) / 2) - (WINDOW_WIDTH / 2),<br />
		(GetSystemMetrics(SM_CYSCREEN) / 2) - (WINDOW_HEIGHT / 2),<br />
		WINDOW_WIDTH,<br />
		WINDOW_HEIGHT,<br />
		NULL,<br />
		NULL,<br />
		hInstance,<br />
		NULL<br />
		);<br />
<br />
	//Make Sure The Window Was A Success<br />
	if (!mainWindow)<br />
		return 0;<br />
<br />
	//Update the Window<br />
	UpdateWindow(mainWindow);<br />
<br />
	//The Main Loop<br />
	MSG msg;<br />
<br />
	while (1)<br />
    {<br />
        if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))<br />
        {<br />
            if (msg.message == WM_QUIT)<br />
                TranslateMessage(&msg);<br />
            DispatchMessage(&msg);<br />
        }<br />
    }<br />
    return (int) msg.wParam;<br />
}<br />
//Callback Function (WindowEvent)<br />
LRESULT CALLBACK WindowEvent(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)<br />
{<br />
    switch (message)<br />
    {<br />
        case WM_CLOSE:<br />
    if (MB_YES == MessageBox(hwnd, _T("Are you sure you want to exit?"), _T("Confirmation"), MB_YESNO))<br />
        DestroyWindow(hwnd);<br />
<br />
    return 0;<br />
        break;<br />
    }<br />
    return DefWindowProc(hWnd, message, wParam, lParam);<br />
}

MrMcIntyre wrote:

if (MB_YES == MessageBox(hwnd, _T("Are you sure you want to exit?"), _T("Confirmation"), MB_YESNO))
DestroyWindow(hwnd);

if (MB_YES == MessageBox(hWnd, ("Are you sure you want to exit?"), ("Confirmation"), MB_YESNO))<br />
DestroyWindow(hWnd); <br />
    else <br />
        return 0;