compiler-warning-level-1-c4117.md

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Learn more about: Compiler Warning (level 1) C4117	Compiler Warning (level 1) C4117	11/04/2016	C4117	C4117	c45aa281-4cc1-4dfd-bd32-bd7a60ddd577

Compiler Warning (level 1) C4117

macro name 'name' is reserved; 'Command' ignored

To fix by checking the following possible causes

1. Trying to define or undefine a predefined macro.

2. Trying to define or undefine the preprocessor operator defined.

The following sample generates C4117:

// C4117.cpp
// compile with: /W1
#define __FILE__ test         // C4117. __FILE__ is a predefined macro
#define ValidMacroName test   // ok

int main() {
}