C# (CSharp) ChatnameTB示例

示例#1

 private void ChatnameTB_Leave(object sender, EventArgs e)
 {
     ChatnameTB.AddText(ChatnamePlaceholder);
 }

示例#2

 private void ChatnameTB_Enter(object sender, EventArgs e)
 {
     ChatnameTB.RemoveText(ChatnamePlaceholder);
 }