Using an external DLL

[tj.dale]

Hi Everyone,

I am trying to use an external DLL.

I need to pass several parameters to it in the form of a string, and get a single return.

The DLL is called ZSSGLOCK.DLL (it performs a security check)

the declaration from the vendor for this DLL is

function ShareGuardLock(LocksmithParameter: PChar): stdcall external 'ZSSGLOCK.dll';

I do have a C++ example for this DLL and have attached here (that's assuming I can attach a file)

any help would be appreciated.

many thanks

[eSignal_JasonK]

Hello tj.dale,

Have you seen our reference material on DLL usage in EFS? Let me know if this helps.

[tj.dale]

Thanks for the reply Jason,

I have seen all the material on the site.

It does help, but not much. What I want is a real example of a DLL being used, that has both a call to the DLL passing data from EFS to the DLL, and a call receiving data or a return from the DLL, do you have such a thing?

many thanks in advance

TJ

[eSignal_JasonK]

Hello TJ,

I'm not well versed in DLL development, but I think the reference material has the example you're looking for.

var d = new DLL("d:/testdll/debug/testdll.dll"); 

d.addFunction("test", DLL.DOUBLE, DLL.CDECL, "Testing123", DLL.INT, DLL.STRING, DLL.FLOAT, DLL.DOUBLE, DLL.BYTE); 

 

function preMain() { 

 var v = d.call("test", 123, "testing 123", 456, 544, 65); 

 debugPrint("v = " + v + "\n"); 

} 

 

function main() { 

 

} 

The var v = d.call(... statement is passing some information to the DLL. The DLL returns some result, which is stored in the variable, v.

[ckryza]

TJ:

I have example code for a Delphi DLL here (the DPR file) as well as a test DLL. In the actual code (the DPR file which is basically a text file) I also listed the EFS language that would be used to call the DLL. When you are working with a 3rd party DLL, it is sometimes a trial-and-error process until you get it right, but it should be doable.

The sample DLL can be found here:

http://share.esignal.com/groupconten...Ls&groupid=114

Chris