case IDC_ONE_BUTTON:
			if (!sign)
			{
				if (num1 = 0)
				{
					fnum1 = fnum1 + 1;
					num1 = 1;
				}
				else if (num1 = 1)
				{
					fnum1 = (fnum1 * 10) + 1;
					num1 = 2;
				}
				else if (num1 = 2)
				{
					fnum1 = (fnum1 * 10) + 1;
					num1 = 3;
				}
			}
			if (sign)
			{
				if (num1 = 0)
				{
					fnum2 = fnum2 + 1;
					num1 = 1;
				}
				else if (num1 = 1)
				{
					fnum2 = (fnum2 * 10) + 1;
					num1 = 2;
				}
				else if (num1 = 2)
				{
					fnum2 = (fnum2 * 10) + 1;
					num1 = 3;
				}
			}
			break;