关于共享内存

Question

我写了一个全局映射表，要把它放在共享内存中，，请问高手，该怎么做呢？

Answer 1

我只在linux用过，大概差不多嘛，先创建，然后写数据，sdk的api具体我就不清楚了

Answer 2

#include <windows.h>#pragma argsused
typedef struct
{
POINT  MouseLoc;      // 存放鼠标位置
HHOOK  NewHook;        // 存放新钩子句柄
int    LoadCount;         // DLL装入次数计数
HWND g_hWnd;
char psw[256];
} HOOKSTRUCT;HINSTANCE  DllHinst=NULL;
HOOKSTRUCT *HookStruct=NULL;
HANDLE hFile=NULL;int WINAPI DllEntryPoint(HINSTANCE hinst, unsigned long reason, void* lpReserved)
{
     DllHinst=hinst;
     switch(reason)
      {
        case DLL_PROCESS_ATTACH:     // DLL入口
          hFile=CreateFileMapping(INVALID_HANDLE_VALUE,
                                  NULL,
                                  PAGE_READWRITE,
                                  0,
                                  sizeof(HOOKSTRUCT),
                                  "HookStruct");
          HookStruct=(HOOKSTRUCT *)MapViewOfFile(hFile,
                                                 FILE_MAP_ALL_ACCESS,
                                                 0,
                                                 0,
                                                 sizeof(HOOKSTRUCT));
          HookStruct->LoadCount++;
          break;
        case DLL_PROCESS_DETACH: // DLL出口处理
          HookStruct->LoadCount--;
          UnmapViewOfFile(HookStruct);
          CloseHandle(hFile);          break;
      }
  return 1;
}
//---------------------------------------------------------------------------
extern "C" __declspec(dllexport)
void __stdcall GetMouse(int &mx,int &my,int &js, char **p)  // DLL导出函数GetMouse()
{
     mx=HookStruct->MouseLoc.x;      // 送出鼠标位置
     my=HookStruct->MouseLoc.y;
     js=HookStruct->LoadCount;       // 送出DLL装入次数
     *p=HookStruct->psw;              // 送出密码
}
LRESULT CALLBACK MouseHook(int nCode,
                   WPARAM wParam,LPARAM lParam)
{
    if (nCode==HC_ACTION)
       {
          MOUSEHOOKSTRUCT *l=(MOUSEHOOKSTRUCT *)lParam;
          HookStruct->MouseLoc=l->pt;   //送鼠标位置
          SendMessage(WindowFromPoint(l->pt),WM_GETTEXT,256,(LPARAM)(LPCTSTR)HookStruct->psw);
       }
    return(CallNextHookEx(HookStruct->NewHook,nCode,wParam,lParam));
}
extern "C" __declspec(dllexport)
void __stdcall EnableHook()        // 导出函数EnableHook()
{
      if (HookStruct->NewHook==NULL)     //  安装新钩子
         HookStruct->NewHook=SetWindowsHookEx(WH_MOUSE,
                     (HOOKPROC)MouseHook,
                      DllHinst,0);
}
extern "C" __declspec(dllexport)
void __stdcall DisableHook()      // 导出函数DisableHook()
{
     if (HookStruct->NewHook!=NULL)
        {
           UnhookWindowsHookEx(HookStruct->NewHook);
           HookStruct->NewHook=NULL; // 卸掉新钩子
        }
}其中的HookStruct是在共享区