fatal-error-c1189.md

description	title	ms.date	f1_keywords	helpviewer_keywords	ms.assetid
Learn more about: Fatal Error C1189	Fatal Error C1189	04/27/2018	C1189	C1189	2e5c8a78-edd4-411c-b619-558a96be148a

Fatal Error C1189

#error : user supplied error message

Remarks

C1189 is generated by the #error directive. The developer who codes the directive specifies the text of the error message. For more information, see #error Directive (C/C++).

Example

The following sample generates C1189. In the sample, the developer issues a custom error message because the _WIN32 identifier is not defined:

// C1189.cpp
#undef _WIN32
#if !defined(_WIN32)
#error _WIN32 must be defined   // C1189
#endif

See also

#define Directive (C/C++)