Error Calling DLL function

Questions & Answers
1

i want Call Dll in unity . But in unity call function SendData(1,2,3,4) not send 1,2,3,4 its send 86972112,2,1,1

What is my wrong Please Help me ? How can i fix this code ?

This is Lazarus function. I want call it from unity

     Function SendData(MG,SG,LG,V:integer):integer;export;
         var
           s:string;
        
        
         begin
        
          fga:=mg;
          sga:=sg;
          faa:=(8*fga)+sg;
          laa:=lg;
          sval:=v;
        
          s:='';
          s:= s+ 'MG :'+inttostr(Mg)+#13;
          s:= s+ 'SG :'+inttostr(sg)+#13;
          s:= s+ 'LG :'+inttostr(lg)+#13;
          s:= s+ 'V :'+inttostr(v)+#13;
        
            MessageBox(0,PChar(s),PChar('Lazarus'),mb_ok);
        
        end;

And This is C# in unity

using UnityEngine;
using System.Runtime.InteropServices;
using System.Collections;
using System;
class CallLazarDLL : MonoBehaviour {


	
	[DllImport ("dllDeneme")]
    private static extern byte Connect ();

	[DllImport ("dllDeneme")]
	private static extern byte Disconnect();
	
	[DllImport ("dllDeneme")]
	private static extern int SendData  (int MG, int SG, int LG, int v);
	
	[DllImport ("dllDeneme")]
	private static extern byte GetData ();
	

	
	public Light switchLight;
   	void Start(){
		print ("Connect :"+ Connect());
	}
	void OnApplicationQuit(){
	print ("Disconnect :" +	Disconnect());
	}
	
	void OnMouseDown () {

		switchLight.enabled = !switchLight.enabled;	   

      	if (switchLight == enabled){
		 	print ("Group" + SendData(1,2,3,4));
		}else{
			print ("Group" + SendData(1,2,3,4));
		}
   }

   void Update(){
	 print ("READ :"+GetData());	
	}
	
	
	
}
2

i was fixed the with stdcall conventions. its now work.
Thank you.