[VC++ 6]KEYGEN V1.1 (UN PEU PLUS DUR)

#include <stdAfx.h>
#include <windows.h>
#include <commctrl.h>
#include <stdlib.h>
#include "resource.h"


double k1,k2,k3,k4;
char buffer[5],buffer1[5],buffer2[5],buffer3[5];


LRESULT CALLBACK DlgProc(HWND hDlg, UINT msg, WPARAM wParam, LPARAM lParam)
{
int nCmdShow;
switch(msg)
{
case WM_CLOSE:
DestroyWindow(hDlg);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
case WM_COMMAND:
switch(HIWORD(wParam))
{
case BN_CLICKED:
switch(LOWORD(wParam))
{
case ID_VERIF:
GetDlgItemText(hDlg,IDC_K1,buffer,5);
GetDlgItemText(hDlg,IDC_K2,buffer1,5);
GetDlgItemText(hDlg,IDC_K3,buffer2,5);
GetDlgItemText(hDlg,IDC_K4,buffer3,5);	
k1 = atof(buffer);
k2 = atof(buffer1);
k3 = atof(buffer2);
k4 = atof(buffer3);


if (k1 == k2 == k3 == k4 )
{
MessageBox(NULL,"Clée desactivée","Erreur",0+MB_ICONASTERISK);
}
else if (k2-k4+k1 < 0 || k3 <0)
{
MessageBox(NULL,"Cette clée est impossible.\nJ'ai pas dis qu'elle est fausse...","Erreur",0+MB_ICONASTERISK);
}
else if (k3 == (k2-k4)+k1)
{
MessageBox(NULL,"Peut etre quelle est valide...\nBah oui quelle est valide !","Ah...",0+MB_ICONASTERISK);
}
else
{
MessageBox(NULL,"Bah non. Cette clée n'est pas valide.","Erreur",0+MB_ICONASTERISK);
}
break;
case IDCANCEL:
DestroyWindow(hDlg);
break;
}
}
break;
default:
return FALSE;
}
return FALSE;
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
LPSTR lpCmdLine, int nCmdShow)
{
HWND hdlg;
MSG Msg;

hdlg = CreateDialog(hInstance,MAKEINTRESOURCE(IDD_DIALOG1), NULL, (DLGPROC) DlgProc);

if(hdlg == NULL)
{
MessageBox(NULL, "Window Creation Failed!", "Error!",
MB_ICONEXCLAMATION | MB_OK);
return 0;
}

ShowWindow(hdlg, nCmdShow);
UpdateWindow(hdlg);

while(GetMessage(&Msg, NULL, 0, 0) > 0)
{
TranslateMessage(&Msg);
DispatchMessage(&Msg);
}
return Msg.wParam;
}