ive fixed the problem with help from 30 days Difference on SYSTEMTIME. Turns out this guy wanted to do almost the same. Should have seen this before
My code is now
WIN32_FILE_ATTRIBUTE_DATA fileAttrData = {0};
GetFileAttributesEx(directory, GetFileExInfoStandard, &fileAttrData);
FILETIME ftCreationTime = fileAttrData.ftCreationTime;
FILETIME now;
SYSTEMTIME nowst;
ULARGE_INTEGER t1, t2;
GetSystemTime(&nowst);
SystemTimeToFileTime(&nowst, &now);
memcpy(&t1, &ftCreationTime, sizeof(t1));
memcpy(&t2, &now, sizeof(t1));
ULONGLONG diff = (t1.QuadPart<t2.QuadPart)?(t2.QuadPart-t1.QuadPart):(t1.QuadPart-t2.QuadPart);
if(diff>30*24*60*60*(ULONGLONG)10000000)
{
return true;
}
return false;