Advantech EP-55XX-AR10 User Manual page 74

bRet = DeviceIoControl(hFile, ADV_STATUS_CTL_CODE, NULL, 0, &ReadByte, sizeof(ReadByte),
&ulBytesReturned, NULL);
if (bRet == FALSE || ulBytesReturned != 1)
{
AfxMessageBox("Failed to Read from cash drawer driver");
CloseHandle(hFile);
return;
}
else
{
AfxMessageBox(ReadByte ? "Drawer Open": "Drawer Closed");
}
CloseHandle(hFile);
}
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