#if

The #if directive controls conditional compilation of the resource file by checking the specified constant expression. If the constant expression is nonzero, #if directs the compiler to continue processing statements up to the next #endif, #else, or #elif directive and then skip to the statement after the #endif directive. If the constant expression is zero, #if directs the compiler to skip to the next #endif, #else, or #elif directive.

#if constant-expression

constant-expression

Expression to be checked. This value is a defined name, an integer constant, or an expression consisting of names, integers, and arithmetic and relational operators.

Example

This example compiles the BITMAP statement only if the value assigned Version is less than 3:

#if Version < 3
BITMAP 1 errbox.bmp
#endif

Related topics

Preprocessor Directives