C++：本地图片拷贝到剪切板

1、本地图片转换为HBITMAP

HBITMAP CNoteWindow::CopySelectRectBitmap(LPCTSTR lpszPath)
{
	HBITMAP hBitmap = NULL;
	//背景色设置为白色。
	Color backColor = Color(255,255,255,255);
	//Status sts
	if (PathFileExists(lpszPath))
	{
		Bitmap* pBitmap = Bitmap::FromFile(lpszPath);
		Status sts = pBitmap->GetLastStatus();
		sts = pBitmap->GetHBITMAP(backColor, &hBitmap);
		if (sts == Ok)
		{
			int k = 0;
		}
	}

	int error = GetLastError();
	return hBitmap;
}

2、HBITMAP 拷贝到剪切板

bool CNoteWindow::BitmapToClipboard(HBITMAP hBM, HWND hWnd)
{
	if (!::OpenClipboard(hWnd))
		return false;
	::EmptyClipboard();

	BITMAP bm;
	::GetObject(hBM, sizeof(bm), &bm);

	BITMAPINFOHEADER bi;
	::ZeroMemory(&bi, sizeof(BITMAPINFOHEADER));
	bi.biSize = sizeof(BITMAPINFOHEADER);
	bi.biWidth = bm.bmWidth;
	bi.biHeight = bm.bmHeight;
	bi.biPlanes = 1;
	bi.biBitCount = bm.bmBitsPixel;
	bi.biCompression = BI_RGB;
	if (bi.biBitCount <= 1)	// make sure bits per pixel is valid
		bi.biBitCount = 1;
	else if (bi.biBitCount <= 4)
		bi.biBitCount = 4;
	else if (bi.biBitCount <= 8)
		bi.biBitCount = 8;
	else // if greater than 8-bit, force to 24-bit
		bi.biBitCount = 24;

	// Get size of color table.
	SIZE_T dwColTableLen = (bi.biBitCount <= 8) ? (1 << bi.biBitCount) * sizeof(RGBQUAD) : 0;

	// Create a device context with palette
	HDC hDC = ::GetDC(NULL);
	HPALETTE hPal = static_cast<HPALETTE>(::GetStockObject(DEFAULT_PALETTE));
	HPALETTE hOldPal = ::SelectPalette(hDC, hPal, FALSE);
	::RealizePalette(hDC);

	// Use GetDIBits to calculate the image size.
	::GetDIBits(hDC, hBM, 0, static_cast<UINT>(bi.biHeight), NULL,
		reinterpret_cast<LPBITMAPINFO>(&bi), DIB_RGB_COLORS);
	// If the driver did not fill in the biSizeImage field, then compute it.
	// Each scan line of the image is aligned on a DWORD (32bit) boundary.
	if (0 == bi.biSizeImage)
		bi.biSizeImage = ((((bi.biWidth * bi.biBitCount) + 31) & ~31) / 8) * bi.biHeight;

	// Allocate memory
	HGLOBAL hDIB = ::GlobalAlloc(GMEM_MOVEABLE, sizeof(BITMAPINFOHEADER) + dwColTableLen + bi.biSizeImage);
	if (hDIB)
	{
		union tagHdr_u
		{
			LPVOID             p;
			LPBYTE             pByte;
			LPBITMAPINFOHEADER pHdr;
			LPBITMAPINFO       pInfo;
		} Hdr;

		Hdr.p = ::GlobalLock(hDIB);
		// Copy the header
		::CopyMemory(Hdr.p, &bi, sizeof(BITMAPINFOHEADER));
		// Convert/copy the image bits and create the color table
		int nConv = ::GetDIBits(hDC, hBM, 0, static_cast<UINT>(bi.biHeight),
			Hdr.pByte + sizeof(BITMAPINFOHEADER) + dwColTableLen,
			Hdr.pInfo, DIB_RGB_COLORS);
		::GlobalUnlock(hDIB);
		if (!nConv)
		{
			::GlobalFree(hDIB);
			hDIB = NULL;
		}
	}
	if (hDIB)
		::SetClipboardData(CF_DIB, hDIB);
	::CloseClipboard();
	::SelectPalette(hDC, hOldPal, FALSE);
	::ReleaseDC(NULL, hDC);
	return NULL != hDIB;
}

参考：
https://www.codeproject.com/Questions/344732/copy-hbitmap-to-clipboard%20%E5%9B%9E%E5%A4%8D%20%E8%B5%9E