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C/C++ code:
void SendScanMessage(HWND hwnd, LPCTSTR szMessage)
{
if (GetRandNumber() == 1)
{
COPYDATASTRUCT copyData;

copyData.dwData = (DWORD) MESSAGE_REGISTRY_CLEAN;
copyData.cbData = ((DWORD)wcslen(szMessage) + 1) * sizeof(TCHAR);
copyData.lpData = _alloca(copyData.cbData);

ZeroMemory(copyData.lpData, copyData.cbData);
CopyMemory(copyData.lpData, szMessage, copyData.cbData);

::SendMessage(hwnd, WM_COPYDATA, (WPARAM)NULL, (LPARAM)&copyData);
}
}

void SendErrorMessage(HWND hwnd, int nSendNumber, LPCTSTR szNumber, LPCTSTR szRepair, LPCTSTR szShowBold, LPCTSTR szShowNormal)
{
std::wstring str = szNumber;
str += L"|";
str += szRepair;
str += L"|";
str += szShowBold;
str += L"|";
str += szShowNormal;

COPYDATASTRUCT copyData;

copyData.dwData = (DWORD) nSendNumber + MESSAGE_REGISTRY_CLEAN;
copyData.cbData = ((DWORD)str.size() + 1) * sizeof(TCHAR);
copyData.lpData = _alloca(copyData.cbData);

ZeroMemory(copyData.lpData, copyData.cbData);
CopyMemory(copyData.lpData, str.c_str(), copyData.cbData);

::SendMessage(hwnd, WM_COPYDATA, (WPARAM)NULL, (LPARAM)&copyData);
}

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