DLL变量共享的问题

#include <windows.h>
struct inkedl
{
    int code;//按键码
    int typel;//类型
    inkedl *next;
};
#pragma data_seg("Shared")

extern "C" inkedl *head=NULL;
#pragma data_seg( )
#pragma comment( linker, "/SECTION:Shared,RWS")
void create(int code,int typel=0)
{
    inkedl *fp;
    inkedl *point;

point=new inkedl;
point->code=code;
point->typel=typel;
if (head==NULL)
{
head=point;
point->next=NULL;
return ;
}
if (head->next==NULL)
{
point->next=head->next;
head->next=point;
//head->typel=1;
return ;
}

 fp=head;
for (inkedl *&mp=head;mp->next;mp=mp->next)
{
if (mp->next->next==NULL)
{
point->next=mp->next->next;
mp->next->next=point;
head=fp;
return ;
}
}
}

extern "C" _declspec(dllexport) void sethook();

HHOOK gouzi=NULL;

LRESULT CALLBACK KeyboardProc(
  int code,       // hook code
  WPARAM wParam,  // virtual-key code
  LPARAM lParam   // keystroke-message information
)
{
if(((DWORD)lParam&0x40000000) && (HC_ACTION==code))
{
switch(wParam)
{
case VK_NUMPAD0: create(96,0);/*MessageBox(NULL,"0","提示",0);*/break;
case VK_NUMPAD1:create(97,0);break;
case VK_NUMPAD2: create(98,0);break;
case VK_NUMPAD3: create(99,0);break;
case VK_NUMPAD4: create(100,0);break;
case VK_NUMPAD5:create(101,0);break;
case VK_NUMPAD6: create(102,0);break;
case VK_NUMPAD7:create(103,0);break;
case VK_NUMPAD8: create(104,0);break;
case VK_NUMPAD9: create(105,0);break;
case VK_UP: create(38,0);break;
case VK_DELETE: create(46,0);break;
case VK_SHIFT: create(16,0);break;
case VK_MENU:create(18,0);break;
case VK_CONTROL: create(17,0);break;
}
}
// return CallNextHookEx(gouzi,code,wParam,lParam);
return 0;
}
extern "C"  _declspec(dllexport) void sethook()
{
gouzi=SetWindowsHookEx(WH_KEYBOARD,KeyboardProc,GetModuleHandle("win32DLL.dll"),0);
}



extern "C" _declspec(dllexport) void playback()//链表回放
{
inkedl *fp=head;
if (head==NULL)
{
    // void sethook();
//MessageBox(NULL,"0111","提示",0);
}
while(head)
{

keybd_event(head->code,KEYEVENTF_EXTENDEDKEY,0,0);
keybd_event(head->code,KEYEVENTF_KEYUP,0,0);

if (head->next==NULL)
{
    head=fp;
}
head=head->next;
}
}