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Way to Go Equis! The limitations of the programming language has been my
only
complaint........but now we have a choice of MANY languages. This is not
just
welcome by system developers, but could also lead to third party involment.
Look out TradeStation here comes MetaStock!!
Adam Hefner
----- Original Message -----
From: Equis Support <support@xxxxxxxxx>
To: <metastock@xxxxxxxxxxxxx>
Sent: Tuesday, November 02, 1999 5:13 PM
Subject: Increasing the MetaStock(R) Formula Language with MetaStock 7
> I've noticed several emails lately discussing MetaStock's Formula Language
> capabilities. I would like to take this time to introduce you to a new
> feature added in MetaStock 7. The new MetaStock External Function (MSX)
> Application Programming Interface (API), available in the MetaStock
> Developer's Kit, allows software developers to dynamically add externally
> defined functions to the MetaStock Formula Language, in MetaStock version
> 7.0 and later.
>
> When MetaStock initializes, it scans a pre-defined folder, looking for any
> DLLs that correctly implement the MSX API. When an MSX DLL is found, the
> functions that it implements are automatically added to the MetaStock
> Formula Language.
> These new functions can be used to create Custom Indicators, Explorations,
> System Tests and Expert Advisors using MetaStock's formula tools.
> The MSX API supports any programming language that meets the following
> criteria:
> * exports DLL functions by name
> * supports the stdcall stack frame convention
> * creates 32-bit DLLs for Windows 95, Windows 98, or Windows NT
> version 4.0 or greater
> This type of DLL is commonly called a Win32 DLL.
>
> Note: Microsoft Visual Basic does not have the capability to produce a
Win32
> DLL. Therefore, MSX DLLs cannot be written in Microsoft Visual Basic. A
> good alternative for VB programmers is PowerBASIC, an inexpensive compiled
> Basic that is syntax-compatible with VB and can produce Win32 DLLs.
> MSX DLL Capabilities
> The functions that can be implemented in MSX DLLs are similar in behavior
to
> the Standard built-in MetaStock functions. In other words, MSX Functions
> can be written to perform calculations based on any available price data
or
> results of other functions. All MSX DLL functions return a data array.
> This exactly parallels the behavior of the MetaStock built-in functions.
> The returned data array can be plotted by Custom Indicators or used in any
> way that a standard built-in function can be used.
> MSX DLLs can perform calculations of virtually unlimited complexity. You
> have the full power of conventional programming languages like C or Pascal
> with all of their logic, data manipulation and rich flow-control
> capabilities.
> Things that you can do with an MSX DLL include:
> * Implement functions not provided with MetaStock.
> * Perform complex calculations on price data.
> * Provide multiple functions in a single MSX DLL.
> * Access stored MetaStock price data using MSFL (included in the
> MetaStock Developers Kit - see the MSFL documentation for details).
> * Create functions that can be used by Custom Indicators, System
> Tests, Explorations, and Experts.
> * Distribute your compiled MSX DLL to other users.
>
> Things that you cannot do with an MSX DLL include:
> * GUI functions including plotting and user dialogs.
> * Access the standard MetaStock built-in functions from within your
> DLL.
>
> This capability is already in MetaStock Professional 7.0 and will be in
the
> upcoming MetaStock End-Of-Day 7.0. The MetaStock Developer's Kit is
expected
> to be available in late November. For the latest details periodically
check
> http://www.equis.com/partners/developers/
>
> Cheryl Elton
> Product Development
> Equis International, Inc
> http://www.equis.com
>
>
>
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