DLLCWinAPI/UsingDLLWinApi/main.cpp

#define _CRT_SECURE_NO_WARNINGS
#include <windows.h>
#include <stdio.h>
#define PATH L"DLLWin.dll"
#include "../structs.h"


typedef ResultUserAndCount(_cdecl* MyFunction)(FILE*);


int main() {

	HINSTANCE hMyDll;
	if ((hMyDll = LoadLibrary(PATH)) == NULL) return 1;
	MyFunction myFun = (MyFunction)GetProcAddress(hMyDll, "GetFirstAndCounter");
	


	FILE* FileHandle = fopen("ds.csv", "r");
	/*wchar_t* buffer = (wchar_t*)malloc(sizeof(wchar_t) * 100);
	DWORD count_buff = 100;
	DWORD count_char = 0;
	while (fscanf(FileHandle, "%s", buffer) == 1) {
		MessageBox(NULL, buffer, L"Îøèáêà", MB_ICONERROR);
		printf("%s", buffer);
	}*/
	/*	CreateFileW(
		L"ds.csv",
		GENERIC_READ,
		FILE_SHARE_READ,
		NULL,
		OPEN_EXISTING,
		FILE_ATTRIBUTE_NORMAL,
		0
	);*/
	if (FileHandle == INVALID_HANDLE_VALUE) {
		int error = GetLastError();
	}
	ResultUserAndCount result = myFun(FileHandle);
	char* buf = (char*)malloc(sizeof(char) * 100);
	snprintf(buf, sizeof buf, "%d", result.count_users);
	printf("%s", buf);
	FreeLibrary(hMyDll);
	return 0;
}