crackme and winapi

#include <windows.h>

#include <stdio.h>

#include <string.h>

void Error(){

MessageBox(0, "Error!!!", "Warning", MB_OK);

printf("Operation Failed!!!\n");

exit(1);

}

-------------------

/*

int main(){

char Name[20]={0};

char fName[30]={0};

DWORD dw;

HANDLE hFile;

printf("input Create File name : ");

gets(Name);

hFile=CreateFile(Name, GENERIC_READ | GENERIC_WRITE, 0,0, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL,0);

if(hFile==INVALID_HANDLE_VALUE) Error();

printf("Create COmplete!\n");

printf("input Program Name or Path : ");

gets(fName);

if(!WriteFile(hFile, fName, strlen(fName), &dw, 0)) Error();

printf("input Complete!\n");

CloseHandle(hFile);

return 0;

}

  */

-------------------

int main(){

char Name[20]={0};

char Buffer[30]={0};

DWORD dw;

HANDLE hFile;

printf("input File name : ");

gets(Name);

hFile=CreateFile(Name, GENERIC_READ | GENERIC_WRITE, 0,0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL,0);

if(!ReadFile (hFile, Buffer, sizeof(Buffer), &dw, 0)) Error();

   //hFile  -> 열었던 파일의 handle값

   

ShellExecute(NULL,"open",Buffer,0,0, SW_SHOW);    //여러가지 기능이 있는 ShellExcute()

printf("Operation Complete !!\n");

CloseHandle(hFile);

return 0;

}

-> 많이 쓰니 외워 두는게 좋음 

eCrack_me_2.exe

-> 우클릭 후 search for 

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실전.zip