如何在C ++中从HBITMAP创建IBuffer？

Question

我有代码，制作屏幕截图，并将其保存到HBITMAP

GetClientRect(hwnd, &rc);
HDC hdcScreen = GetDC(NULL);
HDC hdc = CreateCompatibleDC(hdcScreen);
int width = rc.right - rc.left;
int height = rc.bottom - rc.top;
HBITMAP hbmp = CreateCompatibleBitmap(hdcScreen,width, height);
SelectObject(hdc, hbmp);
PrintWindow(hwnd, hdc, PW_CLIENTONLY);  

然后，我想从 hbmp 对象

创建新的缓冲区（windows.storage.streams.buffer）类实例

Buffer obj = new Buffer(hbmp); // HOW TO DO SOMETHING LIKE THIS ???
SoftwareBitmap^ softwareBitmap = SoftwareBitmap::CreateCopyFromBuffer(obj ,
BitmapPixelFormat::Bgra8, width, height);

主要目标 - 将窗口的屏幕截图保存到SoftwareBitmap对象