C - Acessing Hardware ID Extractor DLL from C - SOLVED

[Viral]

Can you tell me how do i use the following functions in my C program.

function GetCPUID (CpuCore: byte): ShortString; stdcall;
function GetPartitionID(Partition : PChar): ShortString; stdcall;

I do the following and get error

Code: Select all

typedef char* (_stdcall *GETCPUID)(BYTE);
typedef char* (_stdcall *GETPID)(PCHAR);
GETCPUID pGetSerial;
GETPID pGetPID

HMODULE  hWtsLib = LoadLibrary("HardwareIDExtractor.dll");
if (hWtsLib){
pGetSerial = (GETCPUID)GetProcAddress(hWtsLib, "GetCPUID");
char *str = (char*) malloc(1024);
str = pGetSerial((BYTE)"1");

pGetPID= (GETPID )GetProcAddress(hWtsLib, "GetPartitionID");
char *str1 = (char*) malloc(1024);
str1 = pGetPID("C:");
}

[admin]

On which line you get the error? Which is the error?

Also just a short note: ShortString has 255 characters in Pascal. One character is one byte.

Additional resources about importing DLL created in Pascal/Delphi to C/C++:
http://social.msdn.microsoft.com/Forums ... b929781c5/
http://msdn.microsoft.com/en-us/library/42b9ea93.aspx
http://www.experts-exchange.com/Program ... 64107.html

[Viral]

My program crashes when i call the functions GetCPUID and GetPartitionID.
Can you tell me if the call is correct and that i am passing the correct arguments.

[admin]

My program crashes when i call the functions GetCPUID and GetPartitionID

I am not the specialist in C. I will ask somebody from our programming team. However, I am absolutely sure that he will ask me the exact error message you get, so I need this information in order to help you.
Th sooner I get this information, the sooner I can help you.

Please create an account on this forum. This way you will receive a message when a new answer is posted and you will not have to type the passwords every time you post.

[TheHelper]

Hi Viral.

Try this way.

Code: Select all

typedef struct ShortString {
  char len;
  char data[255];
};
typedef void (_stdcall *GETCPUID)(struct ShortString *result, BYTE cpuCore);

GETCPUID pGetSerial;

HMODULE hWtsLib = LoadLibrary("HardwareIDExtractor.dll");
if (hWtsLib) {
  ShortString serial;
  pGetSerial = (GETCPUID)GetProcAddress(hWtsLib, "GetCPUID");
  pGetSerial(&serial, '1');
  char *str = malloc(serial.len + 1); // include space for the trailing \0
  strlcpy(str, serial.data, serial.len);
  str[serial.len] = '\0'; // drop in the trailing null
}

[Viral]

Thanks for the solution, the program does not crash anymore.

But now i get a message box saying Wrong CPU core.

[admin]

But now i get a message box saying Wrong CPU core.

How many cores does your CPU have?

[Viral]

I tried 0,1,2,3 and none worked. My PC is a Intel Centrino dual processor.

Note: My partition ID is working now, so thanks for that.

[admin]

Hi.


The function is like this:

Code: Select all

function GetCPUID(CpuCore: byte): String;
begin
...
if (CpuCore<1) OR (CpuCore>2)
  then Mes('Wrong CPU core!')
  else  ...
...
end;


Where "Byte" is an unsigned 8 bits variable.

So, obviously the value that function receives is not 1 or 2. I think the way you declare the "CpuCore" variable or load a value in it is wrong.

[Viral]

Thanks for the info, i tried few different ways and it worked for me.

[admin]

Ok. Great.