RichTexBox发送图片时xp里正常，win10里为空

public string GetImageInfo()
{
REOBJECT reObject = new QQIMLib.ExtRichTextBox.REOBJECT();
for (int i = 0; i < this.richEditOle.GetObjectCount(); i++)//循环访问richbox中所有图片或对像
{
this.richEditOle.GetObject(i, reObject, QQIMLib.ExtRichTextBox.GETOBJECTOPTIONS.REO_GETOBJ_ALL_INTERFACES);
imageInfo += reObject.cp.ToString() + "," + this.findPic(reObject.dwUser).ImageMD5 + "|";
}
return imageInfo;
}

this.findPic(reObject.dwUser).ImageMD5 总返回空值。RichTexBox发送图片时xp里正常，win10里为空，不知道怎么搞了，有大佬知道原因的告诉一下。