C / C++ / MFC

////////////////////////////////////////////////////////////////////////////////
//  NAME
//     Delay -- pause for N milliseconds
//
//  SYNOPSIS
//     void Delay(DWORD dwMsecs, BOOL bBlocking)
//
//  DESCRIPTION 
//     Delay pauses for the number of milliseconds specified by dwMsecs.
//     If bBlocking is FALSE, messages in the message queue will
//     be processed.  If bBlocking is TRUE, the message queue will
//     not be processed until the delay period is expired.
//
//  RETURN VALUE 
//     None.
//
////////////////////////////////////////////////////////////////////////////////
void Delay(DWORD dwMsecs, BOOL bBlocking)
{
    DWORD dwStrtmsecs, dwCurmsecs;

    dwStrtmsecs = dwCurmsecs = ::GetTickCount();

    do 
    {
        if (!bBlocking)
        {
            MSG msg;
            if (::PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) 
            {
                ::TranslateMessage(&msg);
                ::DispatchMessage(&msg);
            }
        }

        dwCurmsecs = ::GetTickCount();

        // check for timer overflow condition
        if (dwCurmsecs < dwStrtmsecs)
            dwStrtmsecs = dwCurmsecs;

    } while ((dwCurmsecs < (dwMsecs + dwStrtmsecs)));
}

<br />
typedef union _ULARGE_INTEGER <br />
{ <br />
    struct <br />
    {<br />
        DWORD LowPart; <br />
        DWORD HighPart; <br />
    };<br />
    ULONGLONG QuadPart;<br />
} ULARGE_INTEGER; <br />

union u
{
    DWORD dwValue;
    struct s
    {
        WORD wValue1;
        WORD wValue2;
    };
};