C / C++ / MFC

int main(int argc, char* argv[])
{
	printf("Hello World!\n");
	
	char *p;
	int i;
	int iErr;
	
	
	for (i=1; i < argc;i++)
	{
		p=argv[i];
		if(*p=='/')
		{
			p++;
			switch(*p)
			{
			case 't':
				{
					printf("Option :t is introduce\n");
					iErr = 1;
				}
				break;
				
			case 'T':
				{
					printf("Option :T is introduce\n");
					iErr = 2;
				}
				break;
			default : 
				printf("Nothing\n");
				iErr = 0;
			}
		}
		else
		{
			printf("Nothing\n");
			iErr = 0;
		}
	}
	
	return iErr;
}

getchar();

#include <afx.h>

int * m_Response

int CKeypadDlg::DoModal(int *response)
{
m_Response=response;
return CDialog::DoModal()
}

CString m_Result

void CKeypadDlg::OnButton1()
{
   m_Result+="1";
   m_EditCtrl.SetWindowText((LPCTSTR)(LPTSTR)(m_Result))
}

int Result_i=_atoi(m_Result);

void CKeypadDlg::OnOK() 
{
	*m_Response=_atoi(m_Result);
	CDialog::OnOK();
}

CKeypadDlg myDlg
int final_result=0;
myDlg.DoModal(final_result);
//And here you get the result once the dialog is closed ...