Static Constructor in C++

// MyClass.cpp
//
#include "stdafx.h"
#include "MyClass.h"


// Initialization of protected static data members:
void*        MyClass::mpStaticMemory = NULL;
const double MyClass::mPI            = 3.141592;
std::string  MyClass::mStaticStr     = "Init Value";


// Invoke the StaticConstructor & StaticDestructor of the class:
// Make sure you put this AFTER the initialization of the static data members!
INVOKE_STATIC_CONSTRUCTOR(MyClass);


// Default Constructor:
MyClass::MyClass()
{
//	PI = 5.0; // Cannot be done, as PI is const
	mStaticStr = "Modified by Default Constructor";
}

// Destructor:
MyClass::~MyClass()
{
	mStaticStr = "Modified by Default Destructor";
}

// Static Constructor:
void MyClass::StaticConstructor()
{
	mStaticStr = "Modified by Static Constructor";
	mpStaticMemory = new double[10];
}

// Static Destructor:
void MyClass::StaticDestructor()
{
	delete[] mpStaticMemory;
}