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How to use API in a DLL?

Posted on 1999-07-25
Medium Priority
Last Modified: 2010-04-04
Suppose a DLL named "extra.dll" which contains a lot of APIs.  One of the API descriptions copied from the DLL document:
BOOL WINAPI ExtraAPICall_SetRegKey(char *pszName, char *pszCompany, char *pszRegcode);
How can I include/declare the DLL, and how to use the APIs?
PS.  Full source wanted.  Coming with the DLL, there are also some files, such as extracall.h, extrainterface.h;  seems that the DLL is written by C++.
Question by:yingkit
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Author Comment

ID: 1391026
Edited text of question.
LVL 10

Accepted Solution

viktornet earned 90 total points
ID: 1391027
function ExtraAPICall_SetRegKey(pszName : pchar, pszCompany : pchar, pszRegcode : pchar) : boolean; stdcall; external "extra.dll" name 'ExtraAPICall_SetRegKey';

then you can use it as if you were using any other API..


Author Comment

ID: 1391028
Hi Viktor,
One more, can you please tell me how to use the following API?
BOOL WINAPI ExtraAPICall_GetDetails(int &iCount, HWND &hWindow);
From the document, it states that this has NO input arguments, but has output returns.
LVL 10

Expert Comment

ID: 1391029
In fact it has two arguments... some kinda count and a handle to a a window... that might be an edit box or whatever...

I've no idea what GetDetails() does... I've never heard of it.. the documentation you have should tell you what to do...

btw, the parameters are references, just like a pointer, but you don't pass a pointer... rather, you pass it a normal variable... in Delphi that'd be eclared with the VAR statements..

getdetails(var coiunt : integer;.....);

Good Luck!!



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