From: benl@panix.com
Subject: Re: [delphi] explicit DLL linking
Date: Tue, 27 Jun 1995 04:31:17 -0400

<---- Begin Included Message ---->
I need help using LoadLibrary and GetProcAddress to call a DLL function.  I
get LoadLibrary and GetProcAddress to work fine, but how do I call the
function once I have its pointer?
<---- End Included Message ---->

I have dealt with this very problem so I know the answer (YEAH!!!).

Lets take a hypothetical case that you are calling the following
function:

function myfunc(aparam : word) : string; export;


okay.

you need to make a type statement:

type
	Tmyfunc = function(aparam : word) : string;

You've done this already:

var 
	aptr, bptr : TFarProc;
	lhnd : THandle;
	s : string;
begin
	lhnd := loadlibrary('c:\mypath\mylib.dll');
	aptr := getprocaddress('myfunc', lhnd);
{you need to add the next statement}
	bptr := makeprocinstance(aptr, lhnd);
{now if you want to call it, just type cast it}
	s := Tmyfunc(bptr)(60);
end;

					Hope this helps,

							Ben

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

From: Robert <rcram@knoware.nl>
Subject: Re: [delphi] explicit DLL linking
Date: Tue, 27 Jun 95 10:00:25 WET DST

>>>>
I need help using LoadLibrary and GetProcAddress to call a DLL function.  I
get LoadLibrary and GetProcAddress to work fine, but how do I call the
function once I have its pointer?
>>>>

Try this: 

type
  TYourDllFunction = function(<parameters>):<result parameters>;

var
  YourDllFunction: TYourDllFunction;

begin

  Library := LoadLibrary('<DLL name>');

  if Library > HINSTANCE_ERROR then 
  begin
    @YourDllFunction := GetProcAddress(Library, 'YourDLLFunction');
  end;

  {from now on you can just call your DLL function}

  YourDllFunction(<parameters>);
  
end;

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

From: grayzman@Academic.COM (Gregory Rayzman)
Subject: Re: [delphi] explicit DLL linking
Date: Tue, 27 Jun 95 10:35:06 PDT

>>I need help using LoadLibrary and GetProcAddress to call a DLL function.  I
>>get LoadLibrary and GetProcAddress to work fine, but how do I call the
>>function once I have its pointer?
>>
>>
>>
Here is an example

type
 TGetGlobalStr = 	function( S: PChar) : PChar;

var 
 func : TFarProc;
 
begin
  libraryHadle := LoadLibrary('get_glob.dll');
{ Convert from Pascal to C null-string}
  StrPCopy( variableName, varName);

  func := GetProcAddress(libraryHadle, 'GetGlobal');
  ff := TGetGlobalStr (func)( variableName);
end.
Gregory.
-Gregory
grayzman@academic.com