bitmap from clipboard to file

Hi

I've been trying to save a window snapshot (32-bit) to a BMP file, but the saved image is slightly distorted, it looks like the picture is shifted to the right by a few pixels, like this:
http://img97.imageshack.us/img97/5189/clipboard01e.png

here is the code i use (stripped from error checks). It must be something silly I do but after 2 days I can't see what!?

--------------------------------
LPDATAOBJECT pDataObject;
OleGetClipboard(&pDataObject);

FORMATETC fmt = {CF_DIB, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL};
STGMEDIUM stgm;
pDataObject->GetData(&fmt, &stgm);
file = root + _T("x2scrap.bmp");
HANDLE hOut = CreateFile(file, GENERIC_WRITE, 0, NULL,
CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);

LPBITMAPINFOHEADER hDIB = (LPBITMAPINFOHEADER)GlobalLock(stgm.hGlobal);
BITMAPFILEHEADER bmh; 
DWORD sizebm = GlobalSize(stgm.hGlobal); // includes palettes 
bmh.bfType = MAKEWORD('B', 'M');
bmh.bfReserved1 = 0; 
bmh.bfReserved2 = 0; 
bmh.bfOffBits = sizeof(bmh) + hDIB->biSize; 

if(hDIB->biBitCount <= 8) { // palette exists
DWORD tmp = hDIB->biClrUsed;
if(!tmp)
tmp = 1 << hDIB->biBitCount;

bmh.bfOffBits += tmp*sizeof(RGBQUAD);
}

bmh.bfSize = sizebm + sizeof(bmh); 

DWORD ioAmount;
WriteFile(hOut,&bmh,sizeof(bmh),&ioAmount,NULL);
WriteFile(hOut,hDIB,sizebm,&ioAmount,NULL);

GlobalUnlock(stgm.hGlobal);
CloseHandle(hOut);
ReleaseStgMedium(&stgm);
pDataObject->Release();
--------------------------------

any help appreciated
thanks
nikos



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