Article #15749: Calling a Delphi DLL from C

 Technical Information Database

TI749D.txt   Calling a Delphi DLL from C
Category   :General Programming
Platform    :All
Product    :Delphi  1.0

Description:
Calling a DLL  from your C Code.

First create a simple DLL in Delphi:

{ Begin DLL code }

Library MinMax;

Function Min(X, Y: Integer): Integer; export;
begin
  if X < Y then Min := X else Min := Y;
end;

Function Max(X, Y: Integer): Integer; export;
begin
  if X > Y then Max := X else Max := Y;
end;

Exports
  Min index 1,
  Max index 2;

begin
end.

{ End DLL code }

Then to Call it from your C Code:

1. In your .DEF File add:

    IMPORTS
         Min  =MINMAX.Min
         Max  =MINMAX.Max

2. In your C application, you must prototype the functions as:

    int FAR PASCAL Min(int x, y);
    int FAR PASCAL Min(int x, y);

3. Now you can call Min or Max anywhere in your application.

Reference:


7/16/98 4:33:53 PM
 

Last Modified: 01-SEP-99