help/en/manager/usage/step11_app.htm


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  <title>Step 1.1: Creating a protected application</title>
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  <h1>Step 1.1: Creating a protected application</h1>

  <p>The first step is to create an application. This would be a simple app without any user interface and with no serious capabilities. Our goal is to pass a serial number to the licensing system and receive its answer..</p>
  <pre class="code">#include &lt;windows.h&gt;
#include &lt;stdio.h&gt;

bool is_registered(const char *serial)
{
        return serial &amp;&amp; serial[0] == 'X';
}

int main(int argc, char **argv)
{
        char *serial = "Xserialnumber"; // we set the serial number directly in the code, for simplicity
        if (!is_registered(serial))
        {
                printf("please register!\n");
                return 0;
        }
        printf("We are registered.\n");
        return 0;
}
</pre>

  <p>The program uses a very simple way to check the serial number. The <strong>is_registered()</strong> function compares the first symbol of the serial number with 'X' and thinks the number is correct if this they match. For an incorrect serial number, a registration message is displayed, while if a user enter the correct key, "We are registered." is shown instead</p>

  <p>The <a href="step12_code.htm">next step</a> is to add the code to check the serial number using the licensing system of 
  VMProtect.</p><br />
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