Thread: Calling DLL from C "too few arguments to call function"

I have a dll written in C and a C program to call it. The C program gives a compile error "too few arguments to call function" but the function it's calling does not have any arguments.

The dll (SxSv.dll):

Code:

#define EXPORT __declspec(dllexport)
EXPORT int SSV ();

__declspec(dllexport) int __stdcall SSXV()
{
int n = 0;

while(n < 500000){
n += 1;
}

return n;

}

The C program to call the dll (SxSv.c):

Code:

#include "SxSv.h"

int loadDLL( )
{
int status = 0;
TestFunc _TestFunc;
HINSTANCE testLibrary = LoadLibrary("SxSv.dll");

if (testLibrary)
{
_TestFunc = (TestFunc)GetProcAddress(testLibrary, "SSXV");
if (_TestFunc)
{
status = _TestFunc(); // THIS IS THE LINE WITH THE ERROR
}

FreeLibrary(testLibrary);

}
return status;
}

The wrapper's header file (SxSv.h):

Code:

#ifndef DLLHANDLER_C_
#define DLLHANDLER_C_

#include <windows.h>
#include <winbase.h>
#include <windef.h>
#include <stdio.h>

typedef int (*TestFunc)(int);

int loadDLL( void );

#endif

The exported function SSXV() takes no arguments, so why does the line status = _TestFunc(); report "too few arguments" when I compile the C program to call the dll?

Thanks.

Thanks for the tip. I changed it to typedef int (*TestFunc)(void); and now it works.