獲取與文件擴展名關聯的圖標

// 文件名任意
CString strFile = _T("any.") + strExt;
SHFILEINFO shfi;
memset(&shfi,0,sizeof(shfi));
SHGetFileInfo(strFile,
	FILE_ATTRIBUTE_NORMAL,
	&shfi,
	sizeof(shfi),
	SHGFI_ICON|SHGFI_SMALLICON|SHGFI_USEFILEATTRIBUTES);
nImageIndex = m_imageList.Add(shfi.hIcon);