C ++将屏幕截图保存到Buffer

Question

这是我目前的职能：

#include <stdafx.h>
#include <windows.h>

void screenshot()
{
    int screenWidth = GetSystemMetrics(SM_CXSCREEN);
    int screenHeight = GetSystemMetrics(SM_CYSCREEN);
    HWND hWnd = GetConsoleWindow(); //Retrieves the window handle used by the console associated with the calling process.
    HDC hScreen = GetDC(hWnd); //possibly GetDC(NULL) instead? //Retrieves a handle to a device context (DC) for the client area of a specified window or for the entire screen.
    HDC hDC = CreateCompatibleDC(hScreen); //Creates a memory device context (DC) compatible with the specified device.
    HBITMAP hBitmap = CreateCompatibleBitmap(hScreen, screenWidth, screenHeight); //the bitmap handle
    SelectObject(hDC, hBitmap);
    BitBlt(hDC, 0, 0, screenWidth, screenHeight, hScreen, 0, 0, SRCCOPY | CAPTUREBLT); //Performs a bit-block transfer of the color data corresponding to a rectangle of pixels from the specified source device context into a destination device context.

    //...enter "save to buffer" code here...//

    ReleaseDC(hWnd, hScreen);
    DeleteDC(hDC);
    DeleteObject(hBitmap);
}

我的目标是创建一个函数，在调用时，获取屏幕截图并将其数据保存到缓冲区。 我的问题：使用ON32 win32 api将保存到缓冲区的最有效方法是什么？ （添加到缓冲区是代码中唯一缺少的部分）。