> typedef struct // num bytes
> {
> char MM;
> char DD;
> short YY;
> float open;
> float hi;
> float lo;
> float cl;
> long vol;
> char RS;
> float oi;
>
> } *LPSTOCK_RECORD, Stock_Record;

"yuriy_zubarev" <yuriy_zubarev@yahoo.ca> wrote in message
news:1139601329.140831.258290@o13g2000cwo.googlegroups.com...
> Greetings,
>
> I apologize for re-posting this, but I'm running out of options on my
> side.
>
> I've got a DLL that's not COM compatible and I'm stuck using interop
> for the first time. I got couple of simple DLL calls all right but
> cannot get the most important one to work.
>
> Here is documentation:
>
> ---
>
> int LoadSymbol( char*sym, void *data , int max_rec , bool
> IGNORE_HOLIDAYS = true , bool RAWDATA = true ,usr_master_def*MasterRec
> = 0);
>
> Returns: Number of days loaded. Negative number indicates an error.
>
> Parameters:
>
> sym - Points to the stock symbol to load.
>
> data - Points to an array of type Stock_Record.
>
> max_rec - An integer value...
>
> IGNORE_HOLIDAYS - Boolean value...
>
> RAWDATA - Boolean value...
>
> ---
>
> Here is C++ example:
>
> ...
> char symbol[12];
> #define MAX_RECS 10000;
> Stock_Record data[MAX_RECS];
> ...
> num = LoadSymbol( symbol , &data[0] , MAX_RECS , FALSE , TRUE , 0 );
> ...
>
> Here is a definition for Stock_Record struct:
>
> typedef struct
> {
> char MM;
> char DD;
> short YY;
> float open;
> float hi;
> float lo;
> float cl;
> long vol;
> char RS;
> float oi;
>
> } *LPSTOCK_RECORD, Stock_Record;
>
> I don't know if a definition for Master_Rec is necessary (the last
> argument for LoadSymbol function) since they just passed 0 in the
> example. Pardon my naivety if it's totally wrong assumption.
>
> Anyway, when I call this function (LoadSymbol) I got a positive number
> returned meaning that records have been read. The only problem - they
> have no data.
>
> Here is C#:
>
> [DllImport("reader.dll")]
> public static extern int LoadSymbol(string symbol, Stock_Record[]
> records, int maxDays, bool ignoreHolidays, bool rawData, int
> masterRecord);
>
> (I might have screwed up with "int masterRecord" part...). The
> following is C# brother of Stock_Record:
>
> [StructLayout(LayoutKind.Sequential, CharSet=CharSet.Ansi)]
> public struct Stock_Record
> {
> public string MM;
> public string DD;
> public short YY;
> public float open;
> public float hi;
> public float lo;
> public float cl;
> public long vol;
> public string RS;
> public float OI;
>
> }
>
> And some execution code:
>
> ...
> Stock_Record[] records = new Stock_Record[100];
> int daysLoaded = LoadSymbol("MSFT", records, 100, false, true, 0);
> ...
>
> The situation here is that "records" array contains elements with
> default values - Stock_Record doesn't get populated.
>
> Any help would be greatly appreciated (I really mean it).
>
> Thank you.
>
>
>
> ---
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>