HDC converting

Hello....I want to convert HDC -> memory block (memory pointer)
because my program used RPC function on win95.
I need to transfer DC. but I can't use that User-marshalling on win95.
therefore i need to convert HDC -> memory block.
I used this method.
HDC -> Metafile -> memory pointer

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srcDC = CreateEnhMetaFile(hDC, NULL, NULL, NULL);
BitBlt(srcDC, 0, 0, rect->right, rect->bottom, hDC, 0, 0, SRCCOPY);
hMetaFile = CloseEnhMetaFile(srcDC);
nSize = GetEnhMetaFileBits(hMetaFile, 0, NULL);
lpMem = (LPBYTE) GlobalAlloc(GPTR, nSize);
GetEnhMetaFileBits(hMetaFile, nSize, lpMem);

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but very slow!!!
how can i use better method than metafile !!!
thank you!!!