i have these function for create the tooltip:

HWND CreateToolTip(HWND hwndTool, string text)
{

    /*INITCOMMONCONTROLSEX icc;

    icc.dwSize = sizeof(INITCOMMONCONTROLSEX);
    icc.dwICC = ICC_BAR_CLASSES | ICC_TAB_CLASSES | ICC_WIN95_CLASSES;

    InitCommonControlsEx(&icc);*/
    if (text=="")
    {
        return FALSE;
    }
    // Get the window of the tool.
    //HWND hwndTool = GetDlgItem(hDlg, toolID);

    // Create the tooltip. g_hInst is the global instance handle.
    HWND hwndTip = CreateWindowEx(0, TOOLTIPS_CLASS, NULL,
        TTS_ALWAYSTIP|WS_POPUP, //| TTS_BALLOON,
        CW_USEDEFAULT, CW_USEDEFAULT,
        CW_USEDEFAULT, CW_USEDEFAULT,
        GetParent(hwndTool), NULL,
        hinstance, NULL);

    if (!hwndTool || !hwndTip)
    {
        MessageBox(NULL, "Couldn't create the ToolTip control.", "Error", MB_OK);
        return (HWND)NULL;
    }



    // Associate the tooltip with the tool.
    TOOLINFO toolInfo = { 0 };
    toolInfo.cbSize =sizeof (TOOLINFO);// TTTOOLINFOA_V1_SIZE;
    toolInfo.hwnd = GetParent(hwndTool);
    toolInfo.uFlags = TTF_IDISHWND | TTF_SUBCLASS;
    toolInfo.uId = (UINT_PTR)hwndTool;
    toolInfo.lpszText =(LPSTR) text.c_str();



    if (!SendMessage(hwndTip, TTM_ADDTOOL, 0, (LPARAM) (LPTOOLINFO) &toolInfo)) //Will add the Tool Tip on Control
    {
        MessageBox(NULL,to_string(GetLastError()).c_str(), "Error", MB_OK);
    }

    if (SendMessage(hwndTip, TTM_ACTIVATE, TRUE,0)) //Will add the Tool Tip on Control
    {
        MessageBox(NULL,to_string(GetLastError()).c_str(), "Error", MB_OK);

    }

    return hwndTip;
}

my question is: how can i show the ToolTip manually?
i was trying using the ShowWindow() function, but my region function is affecting if the tooltip is showing or not(i'm testing)

And what do you mean by manually?
Please explain....

my Region code affects the ToolTip control. so i did my own ToolTip control and now works fine. thanks for all