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predefined-macros.md

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Predefined Macros
RC does not support the ANSI C predefined macros (\_\_DATE\_\_, \_\_FILE\_\_, \_\_LINE\_\_, \_\_STDC\_\_, \_\_TIME\_\_, \_\_TIMESTAMP\_\_). Therefore, you cannot include these macros in header files that you will include in your resource script.
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05/31/2018

Predefined Macros

RC does not support the ANSI C predefined macros (__DATE__, __FILE__, __LINE__, __STDC__, __TIME__, __TIMESTAMP__). Therefore, you cannot include these macros in header files that you will include in your resource script.

RC does define RC_INVOKED, which enables you conditionally compile portions of your header files, depending on whether the compiler is your C compiler or the RC compiler. This is important because the RC compiler supports only a subset of the statements a C compiler would support.

To conditionally compile your code with the RC compiler, surround code that RC cannot compile with #ifndef RC_INVOKED and #endif.

The following example is taken from the SDK samples. It demonstrates how to create a header file that can be compiled conditionally.

#ifndef RC_INVOKED
#pragma message("Including CntrOutl.H from " __FILE__)
#endif