Windows多个应用程序共享全局变量，静态变量

#pragma date_seg("xx")

#pragma comment(linker,"/SECTION:xx,RWS")

#define _CRT_SECURE_NO_WARNINGS
#include <Windows.h>
#include <stdio.h>

#pragma data_seg("sharedvars")
volatile unsigned int counter = 0;
#pragma data_seg()
#pragma comment(linker,"/SECTION:sharedvars,RWS")


int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE, PTSTR, int) {
    InterlockedExchangeAdd(&counter, 1);

    char cbuf[255];
    sprintf(cbuf,"There are %d app instances.",counter);
    MessageBox(NULL, cbuf, TEXT("Counting how many running application instances"), MB_ICONINFORMATION | MB_OK);

    InterlockedExchangeSubtract(&counter, 1);
    return 0;
}