不常用的Windows API及小功能收集中...

1. 判断当前OS默认的是单击还是双击

BOOL IsDoubleClickInWebView()
{
    SHELLFLAGSTATE sfs;
    ZeroMemory(&sfs, sizeof(SHELLFLAGSTATE));
    SHGetSettings(&sfs, SSF_DOUBLECLICKINWEBVIEW);
    return sfs.fDoubleClickInWebView != 0 ? TRUE : FALSE;
}

2. 获取当前桌面的窗口句柄

HWND FindShellWindow()
{
    // Sometimes, we can't find the desktop window when we use this function, but we must 
    // find it's handle, so we do a loop to find it, but at most we find for 10 times.
    UINT uFindCount = 0;
    HWND hSysListView32Wnd = NULL;
    while (NULL == hSysListView32Wnd && uFindCount < 10)
    {
        HWND hParentWnd = ::GetShellWindow();
        HWND hSHELLDLL_DefViewWnd = ::FindWindowEx(hParentWnd, NULL, L"SHELLDLL_DefView", NULL); 
        hSysListView32Wnd = ::FindWindowEx(hSHELLDLL_DefViewWnd, NULL, L"SysListView32", L"FolderView");

        if (NULL == hSysListView32Wnd)
        {
            hParentWnd = ::FindWindowEx(NULL, NULL, L"WorkerW", L"");
            while((!hSHELLDLL_DefViewWnd) && hParentWnd)
            {
                hSHELLDLL_DefViewWnd = ::FindWindowEx(hParentWnd, NULL, L"SHELLDLL_DefView", NULL);
                hParentWnd = FindWindowEx(NULL, hParentWnd, L"WorkerW", L"");
            }
            hSysListView32Wnd = ::FindWindowEx(hSHELLDLL_DefViewWnd, 0, L"SysListView32", L"FolderView");
        }

        if (NULL == hSysListView32Wnd)
        {
            Sleep(1000);
            uFindCount++;
        }
        else
        {
            break;
        }
    }

    return hSysListView32Wnd;
}