C# 在 webBrowser 光标处插入 html代码

private void BtnInsertMedia_Click(object sender, EventArgs e)
{

InWord frm = new InWord("请填入视频地址（后缀必须是.swf）：");
frm.ShowDialog();
if (frm.Value != null && frm.Value != "")
{

IHTMLDocument2 doc = (IHTMLDocument2)this.webBrowser1.Document.DomDocument;
IHTMLTxtRange range = doc.selection.createRange() as IHTMLTxtRange;
range.pasteHTML(range.text + @"<br /><embed wmode=""transparent"" src=""" + frm.Value + @""" quality=""high"" width=""480"" height=""400"" align=""middle"" allow script Access=""always"" allowfullscreen=""true"" type=""application/x-shockwave-flash""></embed><br />");

}
}
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