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__declspec

Category 

Modifiers, Keyword extensions, Storage class specifiers 

Syntax  

__declspec(<decl-modifier>)

Description 

For a list of __declspec keyword arguments used for the VCL framework, see VCL class declarations. 

Use the __declspec keyword to indicate the storage class attributes for a variable or function. 

The __declspec keyword extends the attribute syntax for storage class modifiers so that their placement in a declarative statement is more flexible. The __declspec keyword and its argument can appear anywhere in the declarator list, as opposed to the old-style modifiers which could only appear immediately preceding the identifier to be modified.

__export void f(void);                      // illegal
void __export f(void)                       // correct
void __declspec(dllexport) f(void);         // correct
__declspec(dllexport)void f(void);          // correct
class __declspec(dllexport) ClassName { }   // correct

In addition to the arguments listed above, the supported decl-modifier arguments are:

  • dllexport
  • dllimport
  • naked
  • noreturn
  • nothrow
  • novtable
  • property
  • selectany
  • thread
  • uuid
These arguments are equivalent to the following storage class attribute keywords.

Argument 
Comparable keyword 
dllexport  
__export  
dllimport  
__import  
thread  
__thread  
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