Hi all

Not sure if solution already exists on this site but I've managed to implement use of the MSFL.dll using C# 2005. Basically I've converted the c++ msfl.h file into a C# compatible form and have used Platform Invoke to call methods on the msfl.dll.

I can make the msfl.cs source code freely available to anyone who wants it.

Regards

Craig

Hi Scott

I'll upload the code to my website when I get home tonight. I have a sample function which uses the MSFL1_GetDataRec() function to retrive all price data for a particular security.

Unfortunately the MSFL2_GetMultipleDataRecs() function doesn't work. So I have to make multiple calls to MSFL1_GetDataRec(), but the performance isn't noticably different.

I'm not sure why MSFL2_GetMultipleDataRecs() doesn't work. I pass the function an array of price record structs but it doesn't populate them.

Brandan - Not sure if you have come across this problem in your dealings with .NET?

----------------------------

As for benefits to compling a C# app instead of C++6, where do I start! [:)]

Its main benefits are that it is very simple to write in (comparable with Visual Basic) and the code runs almost as fast as C++ (approx 1.1 seconds for every 1 second in C++).

For me, writing a function of medium complexity in C++ would take 4 times longer than in C# purely as C# environment is so much easier to use and bug handling/fixing is a dream compared to C++. I now spend more time thinking about trading logic rather than technical programming issues.

I was sceptical of .NET before, it looked like there were lots of incompatibility issues with unmanaged code. However I've found that not to be the case.

C# / .NET has a namespace called InteropServices which allows you to call C# dlls from C++ code.

I use a C++ MSX dll wrapper so that my C# dll can interface with Metastock.

Regards

Craig

I have write this code, and it return -170 from MSFL1_AddSecurity function, means MSFL_ERR_INVALID_FIELD_ORDER , can anyone help me fix this. Thanks in advance.

private void CreateCK()
{
string folder = txtDesPath.Text;
int iErr;
byte nDirNum=0;
iErr = MSFL.MSFL1_OpenDirectory(folder,ref nDirNum,MSFL.MSFL_DIR_FORCE_USER_IN);
if(iErr == 1)
{
iErr = MSFL.MSFL1_BuildMetaStockDirectory(nDirNum);
}
int iDate;
iDate = DateTime.Now.Year * 10000 + DateTime.Now.Month * 100 + DateTime.Now.Day;
// create CK
MSFLSecurityInfo_struct objSec = new MSFLSecurityInfo_struct();
//MSFLSecurityInfo_struct8 objSec = new MSFLSecurityInfo_struct8();
objSec.dwTotalSize = MSFL.MSFL_SEC_INFO_SIZE;
objSec.szName = "VCD";//item[0].ToString();
objSec.szSymbol = "VCD";//item[0].ToString();
objSec.bCompositel = MSFL.MSFL_FALSE; // not a composite
objSec.cPeriodicity = 73; // daily
objSec.wInterval = 0; //not know
objSec.ucDisplayUnits = 0; // not know
//Set the available data
objSec.wDataAvailable = MSFL.MSFL_DATA_DATE + MSFL.MSFL_DATA_CLOSE + MSFL.MSFL_DATA_VOLUME + MSFL.MSFL_DATA_TIME;
//objSec.wDataAvailable = MSFL.MSFL_DATA_DATE + MSFL.MSFL_DATA_CLOSE + MSFL.MSFL_DATA_HIGH + MSFL.MSFL_DATA_LOW + MSFL.MSFL_DATA_OPEN + MSFL.MSFL_DATA_VOLUME;
/*objSec.wDataAvailable = MSFL.MSFL_DATA_DATE + MSFL.MSFL_DATA_CLOSE +
MSFL.MSFL_DATA_VOLUME + MSFL.MSFL_DATA_HIGH + MSFL.MSFL_DATA_LOW +
MSFL.MSFL_DATA_OPEN;*/
objSec.lFirstDate = iDate;
objSec.lLastDate = iDate;

iErr = MSFL.MSFL1_AddSecurity(nDirNum,ref objSec,0);

if(iErr == 0)
{
MessageBox.Show("OK");
}
}