OpenEuphoria

Re: Creating DLL's

• Posted by Kat <gertie at PELL.NET> Feb 27, 2001
• 393 views

On 27 Feb 2001, at 10:02, matthewwalkerlewis at YAHOO.COM wrote:

> 
> Well, I figured out how to create a DLL (and pass arbitrary sequences!)
> using Eu/Eu2C (I've been using the PD version).  To pass sequences, I used a
> modified version of the (de)compress routines in database.e.  I'm sending
> the code to Rob, but here are the basics for creating a DLL:
> 
> 1) Change the entry point by creating a function, DLLMain. DLLMain can be a
> blank function that returns 1.
> 
> BOOL WINAPI DLLMain(HINSTANCE hDLL,DWORD Reason,LPVOID Reserved)
> {
> 
>     return 1;
> };
> 
> 2) Modify WinMain as follows:
> Change the declaration:
> void __declspec(dllexport) Main_(void *hInstance)
> 
> Comment out any references to argc or argv.  These refer to command line
> arguments, and shouldn't be used by the DLL.  If your code uses command line
> arguments, you'll probably want to create some functions to be called to
> replace the command line args.  You'll also need to comment out Cleanup(0)
> at the end of WinMain, to allow the DLL to continue.
> 
> 3) Export functions.  You'll need to add __declspec(dllexport) to the
> declarations of any functions you want to be called from outside the DLL.
> When you import the function to Eu, you'll need to add a '_' to the
> beginning:
> 
> If you have:
> int __declspec(dllexport) foo()
> 
> Then in your Eu program:
> bar = define_c_func( dllname, "_foo", {}, C_INT)
> 
> 4) Change the makefile to compile a DLL.  I've only done this with Borland.
> You'll need to check the manual of your compiler to see how to compile a
> DLL.  The second line of emake.bat will begin:
> 
> @bcc32 -tW ....
> 
> Change this to:
> @bcc32 -tWD ...
> 
> and Borland will compile your code into a DLL.
> 
> 5) You may need to make/remove dummy function calls to keep the translator
> from optimizing routines away.  Just comment these out as appropriate.

How i long for the days when i could click on the Compile button (i think it was
F9 too)
in the Turbo Pascal IDE and get a stand-alone exe that ran perfectly fine. All
those
parameters and macros were stored, and could be reconfigured with a popup check 
box.

Speaking of retro code and OSs, how compatable will the Eu dos gui be to
win3.11?
The pascal ide turned out a copycat gui of win3.x, altho i still think it was MS
that
stole that look and feel from Borland.

Kat