This section describes Microsoft-specific extensions to C++ in the following areas:
Based addressing, the practice of using a pointer as a base from which other pointers can be offset
Extended storage-class attributes declared with the __declspec keyword
The __w64 keyword
Many of the Microsoft-specific keywords can be used to modify declarators to form derived types. For more information about declarators, see Declarators.
Microsoft-Specific Keywords
Keyword |
Meaning |
Used to Form Derived Types? |
|---|---|---|
The name that follows declares a 32-bit offset to the 32-bit base contained in the declaration. |
Yes |
|
The name that follows uses the C naming and calling conventions. |
Yes |
|
The name that follows specifies a Microsoft-specific storage-class attribute. |
No |
|
The name that follows declares a function that uses registers, when available, instead of the stack for argument passing. |
Yes |
|
Similar to __declspec(restrict), but for use on variables. |
No |
|
The name that follows specifies a function that observes the standard calling convention. |
Yes |
|
Marks a data type as being larger on a 64-bit compiler. |
No |
|
Specifies that a pointer to a type or other data is not aligned.. |
No |