void miCopy_Click(object sender, EventArgs e)
{
this.ContextMenu.SourceControl.Select();//先获取焦点，防止点两下才运行
V5RichTextBox rtb = (V5RichTextBox)this.ContextMenu.SourceControl;
rtb.Copy();
}
void Paste_Click(object sender, EventArgs e)
{
this.ContextMenu.SourceControl.Select();
V5RichTextBox rtb = (V5RichTextBox)this.ContextMenu.SourceControl;
rtb.Paste();
}
void Del_Click(object sender, EventArgs e)
{
this.ContextMenu.SourceControl.Select();
V5RichTextBox rtb = (V5RichTextBox)this.ContextMenu.SourceControl;
rtb.Text = "";
}