Win7 different processes using Wm_copydata message communication

Source: Internet
Author: User
Called in high priority programs
    typedef BOOL (WINAPI FAR *changewindowmessagefilterex_proc) (hwnd,uint,dword,pchangefilterstruct);
    Changewindowmessagefilterex_proc M_pfnchangewindowmessagefilterex;
    M_pfnchangewindowmessagefilterex = (Changewindowmessagefilterex_proc):: GetProcAddress (:: GetModuleHandle (_T (" USER32 "))," Changewindowmessagefilterex ");
    if (M_pfnchangewindowmessagefilterex)
        M_pfnchangewindowmessagefilterex (hWnd, Wm_copydata, MSGFLT_ALLOW, NULL);

Use in Low priority

                Copydatastruct Ocopydata = {0};
                Ocopydata.dwdata = 0;
                Ocopydata.cbdata = (strcmdline.length () + 1) * sizeof (TCHAR);
                Ocopydata.lpdata = (pvoid) strcmdline.c_str ();
                Nret =:: SendMessage (hwndprevious, Wm_copydata, 0, (LPARAM) &ocopydata);

Receive in high priority

    if (message = = Wm_copydata)
        copydatastruct *pcd = (copydatastruct*) LParam;
        LPTSTR lpCmdLine = (LPTSTR) pcd->lpdata;
        if (Pcd->cbdata > sizeof (TCHAR) && lpcmdline[pcd->cbdata/sizeof (TCHAR)] = = _t (') ')
            Executeapkinstallerfromcommandline (lpCmdLine);

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