Windows 7 弹出系统菜单不正常（IContextMenu相关），求大神指教

BlackNoodle 2013-01-23 11:58:41

网上搜到的代码改了一下，系统菜单可以弹出，但是，上面没有任何文字所有菜单项点击执行正常，但就是木有文字。
原来的代码是罗朝辉大神写的，地址如下：http://www.cppblog.com/kesalin/archive/2008/02/23/43124.html

修改后代码如下：



static IContextMenu2*  g_pIContext2 = NULL;

static IContextMenu3*  g_pIContext3 = NULL;

void RightMenu(HWND handle,IShellFolder* folder,ITEMIDLIST* pIID)

{

    HWND hwnd    = handle;

    LPCONTEXTMENU pContextMenu = NULL;

    LPCONTEXTMENU pCtxMenuTemp = NULL;

    g_pIContext2 = NULL;

    g_pIContext3 = NULL;

    int menuType = 0;

    HRESULT hRslt = folder->GetUIObjectOf(

                hwnd,

                1,

                (LPCITEMIDLIST*)&(pIID),

                IID_IContextMenu,

                0,

                (void**)&pCtxMenuTemp);

    if (FAILED(hRslt))

    {

        return;

    }

    POINT pt;

    GetCursorPos(&pt);

    if (pCtxMenuTemp->QueryInterface(IID_IContextMenu3,(void**)&pContextMenu) == NOERROR)

    {

        menuType = 3;



        std::cout<<std::endl<<"menu type is 3"<<std::endl;

    }

    else if (pCtxMenuTemp->QueryInterface(IID_IContextMenu2,(void**)&pContextMenu) == NOERROR)

    {

        menuType = 2;



        std::cout<<std::endl<<"menu type is 2"<<std::endl;

    }

    if(pContextMenu)

    {

        std::cout<<"new menu got"<<std::endl;

        pCtxMenuTemp->Release();

    }

    else

    {

        std::cout<<"it's old menu"<<std::endl;

        pContextMenu = pCtxMenuTemp;

        menuType = 1;

    }

    if (menuType == 0)

    {

        std::cout<<"there's no menu"<<std::endl;

        return;

    }

    HMENU hMenu = CreatePopupMenu();

    hRslt = pContextMenu->QueryContextMenu(hMenu,0,1,0x7FFF,CMF_EXPLORE);



    if (FAILED(hRslt))

    {

        return;

    }

    WNDPROC oldWndProc = NULL;

    if (menuType > 1)

    {

        oldWndProc = (WNDPROC)SetWindowLongPtr(handle,GWL_WNDPROC,(LONG)HookWndProc);

		SLINT err = GetLastError();

        if(err)

            std::cout<<"Something wrong when SetWidowLongPtr: "<<err<<std::endl;

        if(menuType == 2)

        {

            g_pIContext2 = (LPCONTEXTMENU2) pContextMenu;

        }

        else

        {

            g_pIContext3 = (LPCONTEXTMENU3) pContextMenu;

        }

    }

    else

    {

        oldWndProc = NULL;

    }

    int cmd = TrackPopupMenu(

                hMenu,

                TPM_LEFTALIGN | TPM_BOTTOMALIGN | TPM_RETURNCMD | TPM_LEFTBUTTON,

                pt.x,

                pt.y,

                0,

                hwnd,

                0);

    if (oldWndProc)

    {

        SetWindowLongPtr(handle,GWL_WNDPROC,(LONG)oldWndProc);

    }

    if (cmd != 0)

    {

        CMINVOKECOMMANDINFO ci = { 0 };

        ci.cbSize = sizeof(CMINVOKECOMMANDINFO);

        ci.hwnd   = hwnd;

        ci.lpVerb = (LPCSTR) MAKEINTRESOURCE(cmd - 1);

        ci.nShow  = SW_SHOWNORMAL;

        pContextMenu->InvokeCommand(&ci);

    }

    pContextMenu->Release();

    g_pIContext2 = NULL;

    g_pIContext3 = NULL;

    DestroyMenu(hMenu);

}

LRESULT CALLBACK HookWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)

{

    DRAWITEMSTRUCT *ds = (DRAWITEMSTRUCT*)lParam;

    switch (message)

    {

    case WM_MENUCHAR:

        if (g_pIContext3)

        {

            LRESULT lResult = 0;

            g_pIContext3->HandleMenuMsg2(message, wParam, lParam, &lResult);

            return(lResult);

        }

        break;

    case WM_DRAWITEM:

    case WM_MEASUREITEM:

        if(wParam)

        {

            break;

        }

    case WM_INITMENUPOPUP:

        if (g_pIContext2)

        {

            g_pIContext2->HandleMenuMsg(message, wParam, lParam);

        }

        else

        {

            if(g_pIContext3)

                g_pIContext3->HandleMenuMsg(message, wParam, lParam);

        }

        return(message == WM_INITMENUPOPUP ? 0 : TRUE);

        break;

    default:

        break;

    }

    return ::CallWindowProc((WNDPROC) GetProp(hWnd, TEXT("oldWndProc")), hWnd, message, wParam, lParam);

}