= Microsoft Warnings = [[PageOutline(1-2)]] ---- == C4100 - Unreferenced formal parameter == #c4100 === Suggestion === Either surround the parameter with C comments (for example: `int /* my_variable */`) or just delete if the variable name is uninformative. If in other's module(s), or you are too busy/idle, at least suppress warning. In generic code you might not be able to comment the variable name as it might actually be used to call a static function. In this case simply referencing the variable (`varname;`) in the function body eliminates the warning. === Suppression === `# pragma warning(disable: 4100) // 'name' : unreferenced formal parameter` ---- == C4127 - Conditional expression is constant == #c4127 === Suggestion === Very common and many believe unhelpful, but a few find it informative, so do not suppress globally. Even `while(true)` can trigger this! `while(true)` can be rewritten as `for(;;)` eliminating the warning. === Suppression === `# pragma warning(disable: 4127) // conditional expression is constant.` ----