求助：MFC下SW_HIDE隐藏进程不完全

Question

如图，按下隐藏计算器后
计算器留下了黑底。

隐藏按钮代码如下

HWND c[1000];int i = 0;
HWND d[1000];int k = 0;
void S::OnBnClickedButton3()
{

    myEnumWindow(NULL, id1);

    HANDLE hSnapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
    DWORD id;
    PROCESSENTRY32 pe;
    pe.dwSize = sizeof(pe);

    BOOL ret = Process32First(hSnapshot, &pe);
    string a;
    string str;
    char buf[50000];
    int r = 0;

    while (ret) {
        WCHAR* wc = pe.szExeFile;
        _bstr_t b(wc);
        char *c = b;
        string d(c);
        id = pe.th32ProcessID;
        if (d == "Calculator.exe") { r = 1; break; }
        ret = Process32Next(hSnapshot, &pe);
    }

    EnumWindows(findEnumWindowCallBack, id);

    for (int j = 0;j < i;j++) {
        ::ShowWindow(c[j], SW_HIDE);

    }
    i = 0;

}

我这个MFC小白真的是没有什么办法了，求大神指教

Answer 1

 HWND hWnd = ::FindWindow(NULL, TEXT("Calculator"));
    if (NULL != hWnd)
    {
        ::ShowWindow(hWnd, SW_HIDE);
    }