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Looking for a good tutorial on DLL imports

  • #1
  • First Post: Sep 5, 2009 11:01am Sep 5, 2009 11:01am
I've asked this before but I suppose asking a second time won't hurt.
lookin for some good tutorials on writing DLL's and importing them into MT4
  • #2
  • Sep 5, 2009 11:33am Sep 5, 2009 11:33am
Quoting FrinkFX
I've asked this before but I suppose asking a second time won't hurt.
lookin for some good tutorials on writing DLL's and importing them into MT4
a minimal example for ObjectPascal (Lazarus, Delphi) would be:

Inserted Code
library foo;

function do_something(a : double) : double; stdcall;
begin
  result := 42 * a;
end;

exports
  do_something;

begin
end.
compile this file with lazarus, fpc, delphi or gpc and you will get foo.dll which exports the function do_something in a way metatrader can use it.

put the dll into experts/libraries and import it like that at the beginning of your mql4 file:

Inserted Code
#import "foo.dll"
double do_something(double a);
#import
  • #3
  • Last Post: Sep 6, 2009 6:36am Sep 6, 2009 6:36am
Quoting FrinkFX
I've asked this before but I suppose asking a second time won't hurt.
lookin for some good tutorials on writing DLL's and importing them into MT4
what are you trying to create?
here's a good tutorial: http://www.mistigrifx.com/book/mql4-programming
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