Save HBITMAP to *.bmp file using only Win32

Question

I have a HBITMAP in my pure Win32 project (no external libraries are used). Can I export it to a *.bmp file using only Winapi and/or CRT functions so I don\'t incur any extr

Answer 1

Yet another minimalistic option is to use OLE's IPicture. It's always been around, still a part of Win32 API:

#define _S(exp) (([](HRESULT hr) { if (FAILED(hr)) _com_raise_error(hr); return hr; })(exp));

PICTDESC pictdesc = {};
pictdesc.cbSizeofstruct = sizeof(pictdesc);
pictdesc.picType = PICTYPE_BITMAP;
pictdesc.bmp.hbitmap = hBitmap;

CComPtr picture;
_S( OleCreatePictureIndirect(&pictdesc, __uuidof(IPicture), FALSE, (LPVOID*)&picture) );

// Save to a stream

CComPtr stream;
_S( CreateStreamOnHGlobal(NULL, TRUE, &stream) );
LONG cbSize = 0;
_S( picture->SaveAsFile(stream, TRUE, &cbSize) );

// Or save to a file

CComPtr disp;
_S( picture->QueryInterface(&disp) );
_S( OleSavePictureFile(disp, CComBSTR("C:\\Temp\\File.bmp")) );