小编Men*_*hif的帖子

我正在尝试用C++构建一个键盘记录器.我的键盘记录器的一部分是捕获屏幕.
经过大量的搜索,我决定尝试通过构建一个来了解它是如何工作的.

这是我的屏幕截图代码:

    HDC hdc = GetDC(NULL); // get the desktop device context
    HDC hDest = CreateCompatibleDC(hdc); // create a device context to use yourself

    // get the height and width of the screen
    int height = GetSystemMetrics(SM_CYVIRTUALSCREEN);
    int width = GetSystemMetrics(SM_CXVIRTUALSCREEN);

    // create a bitmap
    HBITMAP hbDesktop = CreateCompatibleBitmap(hdc, width, height);

    // use the previously created device context with the bitmap
    SelectObject(hDest, hbDesktop);

    // copy from the desktop device context to the bitmap device context
    // call this once …