Function GetLastErrorAsString

libop/base/Utils.cpp:233–256

Returns the last Win32 error, in string format. Returns an empty string if there is no error.

// Returns the last Win32 error, in string format. Returns an empty string if there is no error.
std::string GetLastErrorAsString() {
    // Get the error message ID, if any.
    DWORD errorMessageID = ::GetLastError();
    if (errorMessageID == 0) {
        return std::string(); // No error message has been recorded
    }

    LPSTR messageBuffer = nullptr;

    // Ask Win32 to give us the string version of that message ID.
    // The parameters we pass in, tell Win32 to create the buffer that holds the message for us (because we don't yet
    // know how long the message string will be).
    size_t size =
        FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
                       NULL, errorMessageID, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPSTR)&messageBuffer, 0, NULL);

    // Copy the error message into a std::string.
    std::string message(messageBuffer, size);

    // Free the Win32's string's buffer.
    LocalFree(messageBuffer);

    return message;
}

bool Delay(long mis) {
    MSG msg = {};